id	sid	tid	token	lemma	pos
cord-004751-4vl0cvyq	1	1	key	key	NN
cord-004751-4vl0cvyq	1	2	:	:	:
cord-004751-4vl0cvyq	2	1	cord-004751	cord-004751	NN
cord-004751-4vl0cvyq	2	2	-	-	HYPH
cord-004751-4vl0cvyq	2	3	4vl0cvyq	4vl0cvyq	JJ
cord-004751-4vl0cvyq	2	4	authors	author	NNS
cord-004751-4vl0cvyq	2	5	:	:	:
cord-004751-4vl0cvyq	2	6	Mostow	Mostow	NNP
cord-004751-4vl0cvyq	2	7	,	,	,
cord-004751-4vl0cvyq	2	8	S.	S.	NNP
cord-004751-4vl0cvyq	2	9	R.	R.	NNP
cord-004751-4vl0cvyq	2	10	;	;	:
cord-004751-4vl0cvyq	2	11	Tyrrell	Tyrrell	NNP
cord-004751-4vl0cvyq	2	12	,	,	,
cord-004751-4vl0cvyq	2	13	D.	D.	NNP
cord-004751-4vl0cvyq	2	14	A.	a.	NN
cord-004751-4vl0cvyq	2	15	J.	J.	NNP
cord-004751-4vl0cvyq	3	1	title	title	NN
cord-004751-4vl0cvyq	3	2	:	:	:
cord-004751-4vl0cvyq	4	1	The	the	DT
cord-004751-4vl0cvyq	4	2	behaviour	behaviour	NN
cord-004751-4vl0cvyq	4	3	in	in	IN
cord-004751-4vl0cvyq	4	4	vitro	vitro	FW
cord-004751-4vl0cvyq	4	5	of	of	IN
cord-004751-4vl0cvyq	4	6	attenuated	attenuated	JJ
cord-004751-4vl0cvyq	4	7	recombinant	recombinant	JJ
cord-004751-4vl0cvyq	4	8	influenza	influenza	NN
cord-004751-4vl0cvyq	4	9	viruses	virus	NNS
cord-004751-4vl0cvyq	4	10	date	date	NN
cord-004751-4vl0cvyq	4	11	:	:	:
cord-004751-4vl0cvyq	4	12	1973	1973	CD
cord-004751-4vl0cvyq	4	13	journal	journal	NN
cord-004751-4vl0cvyq	4	14	:	:	:
cord-004751-4vl0cvyq	4	15	Arch	Arch	NNP
cord-004751-4vl0cvyq	4	16	Gesamte	Gesamte	NNP
cord-004751-4vl0cvyq	4	17	Virusforsch	Virusforsch	NNP
cord-004751-4vl0cvyq	4	18	DOI	DOI	NNP
cord-004751-4vl0cvyq	4	19	:	:	:
cord-004751-4vl0cvyq	4	20	10.1007	10.1007	CD
cord-004751-4vl0cvyq	4	21	/	/	SYM
cord-004751-4vl0cvyq	4	22	bf01556156	bf01556156	CC
cord-004751-4vl0cvyq	4	23	sha	sha	NNP
cord-004751-4vl0cvyq	4	24	:	:	:
cord-004751-4vl0cvyq	4	25	4b95c516405830415f1d82d50f89a50510f0bc93	4b95c516405830415f1d82d50f89a50510f0bc93	CD
cord-004751-4vl0cvyq	4	26	doc_id	doc_id	CD
cord-004751-4vl0cvyq	4	27	:	:	:
cord-004751-4vl0cvyq	4	28	4751	4751	CD
cord-004751-4vl0cvyq	4	29	cord_uid	cord_uid	NNS
cord-004751-4vl0cvyq	4	30	:	:	:
cord-004751-4vl0cvyq	5	1	4vl0cvyq	4vl0cvyq	NNP
cord-004751-4vl0cvyq	5	2	Influenza	Influenza	NNP
cord-004751-4vl0cvyq	5	3	strains	strain	NNS
cord-004751-4vl0cvyq	5	4	produced	produce	VBN
cord-004751-4vl0cvyq	5	5	by	by	IN
cord-004751-4vl0cvyq	5	6	recombination	recombination	NN
cord-004751-4vl0cvyq	5	7	and	and	CC
cord-004751-4vl0cvyq	5	8	tested	test	VBN
cord-004751-4vl0cvyq	5	9	as	as	IN
cord-004751-4vl0cvyq	5	10	possible	possible	JJ
cord-004751-4vl0cvyq	5	11	live	live	JJ
cord-004751-4vl0cvyq	5	12	vaccine	vaccine	NN
cord-004751-4vl0cvyq	5	13	candidates	candidate	NNS
cord-004751-4vl0cvyq	5	14	were	be	VBD
cord-004751-4vl0cvyq	5	15	studied	study	VBN
cord-004751-4vl0cvyq	5	16	in	in	IN
cord-004751-4vl0cvyq	5	17	organ	organ	NN
cord-004751-4vl0cvyq	5	18	cultures	culture	NNS
cord-004751-4vl0cvyq	5	19	of	of	IN
cord-004751-4vl0cvyq	5	20	trachea	trachea	NN
cord-004751-4vl0cvyq	5	21	.	.	.
cord-004751-4vl0cvyq	6	1	Two	two	CD
cord-004751-4vl0cvyq	6	2	strains	strain	NNS
cord-004751-4vl0cvyq	6	3	which	which	WDT
cord-004751-4vl0cvyq	6	4	proved	prove	VBD
cord-004751-4vl0cvyq	6	5	to	to	TO
cord-004751-4vl0cvyq	6	6	be	be	VB
cord-004751-4vl0cvyq	6	7	too	too	RB
cord-004751-4vl0cvyq	6	8	virulent	virulent	JJ
cord-004751-4vl0cvyq	6	9	in	in	IN
cord-004751-4vl0cvyq	6	10	human	human	JJ
cord-004751-4vl0cvyq	6	11	volunteers	volunteer	NNS
cord-004751-4vl0cvyq	6	12	regularly	regularly	RB
cord-004751-4vl0cvyq	6	13	caused	cause	VBD
cord-004751-4vl0cvyq	6	14	damage	damage	NN
cord-004751-4vl0cvyq	6	15	to	to	IN
cord-004751-4vl0cvyq	6	16	the	the	DT
cord-004751-4vl0cvyq	6	17	ciliated	ciliated	JJ
cord-004751-4vl0cvyq	6	18	epithelium	epithelium	NN
cord-004751-4vl0cvyq	6	19	and	and	CC
cord-004751-4vl0cvyq	6	20	viruses	virus	NNS
cord-004751-4vl0cvyq	6	21	grew	grow	VBD
cord-004751-4vl0cvyq	6	22	to	to	IN
cord-004751-4vl0cvyq	6	23	high	high	JJ
cord-004751-4vl0cvyq	6	24	titre	titre	NN
cord-004751-4vl0cvyq	6	25	.	.	.
cord-004751-4vl0cvyq	7	1	Two	two	CD
cord-004751-4vl0cvyq	7	2	strains	strain	NNS
cord-004751-4vl0cvyq	7	3	which	which	WDT
cord-004751-4vl0cvyq	7	4	proved	prove	VBD
cord-004751-4vl0cvyq	7	5	to	to	TO
cord-004751-4vl0cvyq	7	6	be	be	VB
cord-004751-4vl0cvyq	7	7	attenuated	attenuate	VBN
cord-004751-4vl0cvyq	7	8	for	for	IN
cord-004751-4vl0cvyq	7	9	volunteers	volunteer	NNS
cord-004751-4vl0cvyq	7	10	did	do	VBD
cord-004751-4vl0cvyq	7	11	not	not	RB
cord-004751-4vl0cvyq	7	12	cause	cause	VB
cord-004751-4vl0cvyq	7	13	appreciable	appreciable	JJ
cord-004751-4vl0cvyq	7	14	damage	damage	NN
cord-004751-4vl0cvyq	7	15	,	,	,
cord-004751-4vl0cvyq	7	16	although	although	IN
cord-004751-4vl0cvyq	7	17	they	-PRON-	PRP
cord-004751-4vl0cvyq	7	18	replicated	replicate	VBD
cord-004751-4vl0cvyq	7	19	to	to	IN
cord-004751-4vl0cvyq	7	20	low	low	JJ
cord-004751-4vl0cvyq	7	21	titre	titre	NN
cord-004751-4vl0cvyq	7	22	in	in	IN
cord-004751-4vl0cvyq	7	23	the	the	DT
cord-004751-4vl0cvyq	7	24	epithelium	epithelium	NN
cord-004751-4vl0cvyq	7	25	.	.	.
cord-004751-4vl0cvyq	8	1	Similar	similar	JJ
cord-004751-4vl0cvyq	8	2	results	result	NNS
cord-004751-4vl0cvyq	8	3	were	be	VBD
cord-004751-4vl0cvyq	8	4	obtained	obtain	VBN
cord-004751-4vl0cvyq	8	5	with	with	IN
cord-004751-4vl0cvyq	8	6	influenza	influenza	NN
cord-004751-4vl0cvyq	8	7	A	a	DT
cord-004751-4vl0cvyq	8	8	virus	virus	NN
cord-004751-4vl0cvyq	8	9	attenuated	attenuate	VBN
cord-004751-4vl0cvyq	8	10	by	by	IN
cord-004751-4vl0cvyq	8	11	passage	passage	NN
cord-004751-4vl0cvyq	8	12	in	in	IN
cord-004751-4vl0cvyq	8	13	the	the	DT
cord-004751-4vl0cvyq	8	14	presence	presence	NN
cord-004751-4vl0cvyq	8	15	of	of	IN
cord-004751-4vl0cvyq	8	16	horse	horse	NNP
cord-004751-4vl0cvyq	8	17	sera	sera	NNP
cord-004751-4vl0cvyq	8	18	.	.	.
cord-004751-4vl0cvyq	9	1	The	the	DT
cord-004751-4vl0cvyq	9	2	method	method	NN
cord-004751-4vl0cvyq	9	3	may	may	MD
cord-004751-4vl0cvyq	9	4	be	be	VB
cord-004751-4vl0cvyq	9	5	of	of	IN
cord-004751-4vl0cvyq	9	6	value	value	NN
cord-004751-4vl0cvyq	9	7	for	for	IN
cord-004751-4vl0cvyq	9	8	detecting	detect	VBG
cord-004751-4vl0cvyq	9	9	virulent	virulent	JJ
cord-004751-4vl0cvyq	9	10	live	live	JJ
cord-004751-4vl0cvyq	9	11	influenza	influenza	NN
cord-004751-4vl0cvyq	9	12	vaccine	vaccine	NN
cord-004751-4vl0cvyq	9	13	candidates	candidate	NNS
cord-004751-4vl0cvyq	9	14	without	without	IN
cord-004751-4vl0cvyq	9	15	risking	risk	VBG
cord-004751-4vl0cvyq	9	16	severe	severe	JJ
cord-004751-4vl0cvyq	9	17	illness	illness	NN
cord-004751-4vl0cvyq	9	18	in	in	IN
cord-004751-4vl0cvyq	9	19	volunteers	volunteer	NNS
cord-004751-4vl0cvyq	9	20	.	.	.
cord-004751-4vl0cvyq	10	1	Attenuated	attenuated	JJ
cord-004751-4vl0cvyq	10	2	influenza	influenza	NN
cord-004751-4vl0cvyq	10	3	viruses	virus	NNS
cord-004751-4vl0cvyq	10	4	have	have	VBP
cord-004751-4vl0cvyq	10	5	been	be	VBN
cord-004751-4vl0cvyq	10	6	produced	produce	VBN
cord-004751-4vl0cvyq	10	7	recently	recently	RB
cord-004751-4vl0cvyq	10	8	by	by	IN
cord-004751-4vl0cvyq	10	9	genetic	genetic	JJ
cord-004751-4vl0cvyq	10	10	recombination	recombination	NN
cord-004751-4vl0cvyq	10	11	of	of	IN
cord-004751-4vl0cvyq	10	12	avirulent	avirulent	JJ
cord-004751-4vl0cvyq	10	13	laboratory	laboratory	NN
cord-004751-4vl0cvyq	10	14	-	-	HYPH
cord-004751-4vl0cvyq	10	15	adapted	adapt	VBN
cord-004751-4vl0cvyq	10	16	strains	strain	NNS
cord-004751-4vl0cvyq	10	17	and	and	CC
cord-004751-4vl0cvyq	10	18	virulent	virulent	JJ
cord-004751-4vl0cvyq	10	19	parents	parent	NNS
cord-004751-4vl0cvyq	10	20	(	(	-LRB-
cord-004751-4vl0cvyq	10	21	BEARE	BEARE	NNP
cord-004751-4vl0cvyq	10	22	and	and	CC
cord-004751-4vl0cvyq	10	23	HALL	HALL	NNP
cord-004751-4vl0cvyq	10	24	,	,	,
cord-004751-4vl0cvyq	10	25	1971	1971	CD
cord-004751-4vl0cvyq	10	26	;	;	.
cord-004751-4vl0cvyq	11	1	McCAHo~	McCAHo~	NNP
cord-004751-4vl0cvyq	11	2	and	and	CC
cord-004751-4vl0cvyq	11	3	SCHILD	SCHILD	NNP
cord-004751-4vl0cvyq	11	4	,	,	,
cord-004751-4vl0cvyq	11	5	1972	1972	CD
cord-004751-4vl0cvyq	11	6	)	)	-RRB-
cord-004751-4vl0cvyq	11	7	.	.	.
cord-004751-4vl0cvyq	12	1	This	this	DT
cord-004751-4vl0cvyq	12	2	method	method	NN
cord-004751-4vl0cvyq	12	3	,	,	,
cord-004751-4vl0cvyq	12	4	which	which	WDT
cord-004751-4vl0cvyq	12	5	is	be	VBZ
cord-004751-4vl0cvyq	12	6	the	the	DT
cord-004751-4vl0cvyq	12	7	most	most	RBS
cord-004751-4vl0cvyq	12	8	rapid	rapid	JJ
cord-004751-4vl0cvyq	12	9	means	mean	NNS
cord-004751-4vl0cvyq	12	10	of	of	IN
cord-004751-4vl0cvyq	12	11	producing	produce	VBG
cord-004751-4vl0cvyq	12	12	attenuated	attenuated	JJ
cord-004751-4vl0cvyq	12	13	influenza	influenza	NN
cord-004751-4vl0cvyq	12	14	strains	strain	NNS
cord-004751-4vl0cvyq	12	15	to	to	IN
cord-004751-4vl0cvyq	12	16	date	date	NN
cord-004751-4vl0cvyq	12	17	,	,	,
cord-004751-4vl0cvyq	12	18	results	result	NNS
cord-004751-4vl0cvyq	12	19	in	in	IN
cord-004751-4vl0cvyq	12	20	a	a	DT
cord-004751-4vl0cvyq	12	21	spectrum	spectrum	NN
cord-004751-4vl0cvyq	12	22	of	of	IN
cord-004751-4vl0cvyq	12	23	both	both	CC
cord-004751-4vl0cvyq	12	24	attenuated	attenuated	JJ
cord-004751-4vl0cvyq	12	25	and	and	CC
cord-004751-4vl0cvyq	12	26	virulent	virulent	JJ
cord-004751-4vl0cvyq	12	27	clones	clone	NNS
cord-004751-4vl0cvyq	12	28	as	as	IN
cord-004751-4vl0cvyq	12	29	judged	judge	VBN
cord-004751-4vl0cvyq	12	30	by	by	IN
cord-004751-4vl0cvyq	12	31	their	-PRON-	PRP$
cord-004751-4vl0cvyq	12	32	effects	effect	NNS
cord-004751-4vl0cvyq	12	33	in	in	IN
cord-004751-4vl0cvyq	12	34	human	human	JJ
cord-004751-4vl0cvyq	12	35	volunteers	volunteer	NNS
cord-004751-4vl0cvyq	12	36	.	.	.
cord-004751-4vl0cvyq	13	1	Unfortunately	unfortunately	RB
cord-004751-4vl0cvyq	13	2	,	,	,
cord-004751-4vl0cvyq	13	3	virulence	virulence	NN
cord-004751-4vl0cvyq	13	4	can	can	MD
cord-004751-4vl0cvyq	13	5	not	not	RB
cord-004751-4vl0cvyq	13	6	be	be	VB
cord-004751-4vl0cvyq	13	7	predicted	predict	VBN
cord-004751-4vl0cvyq	13	8	by	by	IN
cord-004751-4vl0cvyq	13	9	laboratory	laboratory	NN
cord-004751-4vl0cvyq	13	10	tests	test	NNS
cord-004751-4vl0cvyq	13	11	such	such	JJ
cord-004751-4vl0cvyq	13	12	as	as	IN
cord-004751-4vl0cvyq	13	13	yield	yield	NN
cord-004751-4vl0cvyq	13	14	in	in	IN
cord-004751-4vl0cvyq	13	15	eggs	egg	NNS
cord-004751-4vl0cvyq	13	16	,	,	,
cord-004751-4vl0cvyq	13	17	mouse	mouse	NN
cord-004751-4vl0cvyq	13	18	virulence	virulence	NN
cord-004751-4vl0cvyq	13	19	,	,	,
cord-004751-4vl0cvyq	13	20	and	and	CC
cord-004751-4vl0cvyq	13	21	growth	growth	NN
cord-004751-4vl0cvyq	13	22	at	at	IN
cord-004751-4vl0cvyq	13	23	high	high	JJ
cord-004751-4vl0cvyq	13	24	temperatures	temperature	NNS
cord-004751-4vl0cvyq	13	25	and	and	CC
cord-004751-4vl0cvyq	13	26	volunteer	volunteer	NN
cord-004751-4vl0cvyq	13	27	tests	test	NNS
cord-004751-4vl0cvyq	13	28	are	be	VBP
cord-004751-4vl0cvyq	13	29	slow	slow	JJ
cord-004751-4vl0cvyq	13	30	and	and	CC
cord-004751-4vl0cvyq	13	31	difficult	difficult	JJ
cord-004751-4vl0cvyq	13	32	to	to	TO
cord-004751-4vl0cvyq	13	33	quantitate	quantitate	VB
cord-004751-4vl0cvyq	13	34	.	.	.
cord-004751-4vl0cvyq	14	1	This	this	DT
cord-004751-4vl0cvyq	14	2	method	method	NN
cord-004751-4vl0cvyq	14	3	might	may	MD
cord-004751-4vl0cvyq	14	4	occasionally	occasionally	RB
cord-004751-4vl0cvyq	14	5	result	result	VB
cord-004751-4vl0cvyq	14	6	in	in	IN
cord-004751-4vl0cvyq	14	7	the	the	DT
cord-004751-4vl0cvyq	14	8	production	production	NN
cord-004751-4vl0cvyq	14	9	of	of	IN
cord-004751-4vl0cvyq	14	10	new	new	JJ
cord-004751-4vl0cvyq	14	11	phenotypes	phenotype	NNS
cord-004751-4vl0cvyq	14	12	with	with	IN
cord-004751-4vl0cvyq	14	13	characteristics	characteristic	NNS
cord-004751-4vl0cvyq	14	14	not	not	RB
cord-004751-4vl0cvyq	14	15	seen	see	VBN
cord-004751-4vl0cvyq	14	16	in	in	IN
cord-004751-4vl0cvyq	14	17	either	either	DT
cord-004751-4vl0cvyq	14	18	parent	parent	NN
cord-004751-4vl0cvyq	14	19	and	and	CC
cord-004751-4vl0cvyq	14	20	a	a	DT
cord-004751-4vl0cvyq	14	21	recombinant	recombinant	JJ
cord-004751-4vl0cvyq	14	22	more	more	RBR
cord-004751-4vl0cvyq	14	23	virulent	virulent	JJ
cord-004751-4vl0cvyq	14	24	than	than	IN
cord-004751-4vl0cvyq	14	25	the	the	DT
cord-004751-4vl0cvyq	14	26	virulent	virulent	JJ
cord-004751-4vl0cvyq	14	27	parent	parent	NN
cord-004751-4vl0cvyq	14	28	strain	strain	NN
cord-004751-4vl0cvyq	14	29	could	could	MD
cord-004751-4vl0cvyq	14	30	be	be	VB
cord-004751-4vl0cvyq	14	31	produced	produce	VBN
cord-004751-4vl0cvyq	14	32	(	(	-LRB-
cord-004751-4vl0cvyq	14	33	KILBOVR	KILBOVR	NNP
cord-004751-4vl0cvyq	14	34	~	~	NFP
cord-004751-4vl0cvyq	14	35	S	S	NNP
cord-004751-4vl0cvyq	14	36	,	,	,
cord-004751-4vl0cvyq	14	37	,	,	,
cord-004751-4vl0cvyq	14	38	1969	1969	CD
cord-004751-4vl0cvyq	14	39	)	)	-RRB-
cord-004751-4vl0cvyq	14	40	.	.	.
cord-004751-4vl0cvyq	15	1	For	for	IN
cord-004751-4vl0cvyq	15	2	these	these	DT
cord-004751-4vl0cvyq	15	3	reasons	reason	NNS
cord-004751-4vl0cvyq	15	4	we	-PRON-	PRP
cord-004751-4vl0cvyq	15	5	wished	wish	VBD
cord-004751-4vl0cvyq	15	6	to	to	TO
cord-004751-4vl0cvyq	15	7	find	find	VB
cord-004751-4vl0cvyq	15	8	a	a	DT
cord-004751-4vl0cvyq	15	9	new	new	JJ
cord-004751-4vl0cvyq	15	10	in	in	IN
cord-004751-4vl0cvyq	15	11	vitro	vitro	FW
cord-004751-4vl0cvyq	15	12	marker	marker	NN
cord-004751-4vl0cvyq	15	13	of	of	IN
cord-004751-4vl0cvyq	15	14	influenza	influenza	NN
cord-004751-4vl0cvyq	15	15	virus	virus	NN
cord-004751-4vl0cvyq	15	16	virulence	virulence	NN
cord-004751-4vl0cvyq	15	17	.	.	.
cord-004751-4vl0cvyq	16	1	This	this	DT
cord-004751-4vl0cvyq	16	2	paper	paper	NN
cord-004751-4vl0cvyq	16	3	describes	describe	VBZ
cord-004751-4vl0cvyq	16	4	a	a	DT
cord-004751-4vl0cvyq	16	5	method	method	NN
cord-004751-4vl0cvyq	16	6	using	use	VBG
cord-004751-4vl0cvyq	16	7	the	the	DT
cord-004751-4vl0cvyq	16	8	ciliated	ciliated	JJ
cord-004751-4vl0cvyq	16	9	epithelium	epithelium	NN
cord-004751-4vl0cvyq	16	10	of	of	IN
cord-004751-4vl0cvyq	16	11	human	human	JJ
cord-004751-4vl0cvyq	16	12	foetal	foetal	JJ
cord-004751-4vl0cvyq	16	13	tracheal	tracheal	JJ
cord-004751-4vl0cvyq	16	14	organ	organ	NN
cord-004751-4vl0cvyq	16	15	culture	culture	NN
cord-004751-4vl0cvyq	16	16	.	.	.
cord-004751-4vl0cvyq	16	17	 	 	_SP
cord-004751-4vl0cvyq	17	1	All	all	PDT
cord-004751-4vl0cvyq	17	2	the	the	DT
cord-004751-4vl0cvyq	17	3	viruses	virus	NNS
cord-004751-4vl0cvyq	17	4	tested	test	VBN
cord-004751-4vl0cvyq	17	5	were	be	VBD
cord-004751-4vl0cvyq	17	6	provided	provide	VBN
cord-004751-4vl0cvyq	17	7	by	by	IN
cord-004751-4vl0cvyq	17	8	Dr.	Dr.	NNP
cord-004751-4vl0cvyq	17	9	A.	A.	NNP
cord-004751-4vl0cvyq	17	10	S.	S.	NNP
cord-004751-4vl0cvyq	17	11	Beare	Beare	NNP
cord-004751-4vl0cvyq	17	12	.	.	.
cord-004751-4vl0cvyq	18	1	The	the	DT
cord-004751-4vl0cvyq	18	2	parent	parent	NN
cord-004751-4vl0cvyq	18	3	strains	strain	NNS
cord-004751-4vl0cvyq	18	4	were	be	VBD
cord-004751-4vl0cvyq	18	5	A	a	DT
cord-004751-4vl0cvyq	18	6	/	/	SYM
cord-004751-4vl0cvyq	18	7	PR	pr	NN
cord-004751-4vl0cvyq	18	8	8/34	8/34	CD
cord-004751-4vl0cvyq	18	9	(	(	-LRB-
cord-004751-4vl0cvyq	18	10	HON0	HON0	NNP
cord-004751-4vl0cvyq	18	11	)	)	-RRB-
cord-004751-4vl0cvyq	18	12	of	of	IN
cord-004751-4vl0cvyq	18	13	unknown	unknown	JJ
cord-004751-4vl0cvyq	18	14	passage	passage	NN
cord-004751-4vl0cvyq	18	15	history	history	NN
cord-004751-4vl0cvyq	18	16	which	which	WDT
cord-004751-4vl0cvyq	18	17	had	have	VBD
cord-004751-4vl0cvyq	18	18	been	be	VBN
cord-004751-4vl0cvyq	18	19	passed	pass	VBN
cord-004751-4vl0cvyq	18	20	once	once	RB
cord-004751-4vl0cvyq	18	21	in	in	IN
cord-004751-4vl0cvyq	18	22	organ	organ	NN
cord-004751-4vl0cvyq	18	23	cultures	culture	NNS
cord-004751-4vl0cvyq	18	24	of	of	IN
cord-004751-4vl0cvyq	18	25	human	human	JJ
cord-004751-4vl0cvyq	18	26	embryo	embryo	NN
cord-004751-4vl0cvyq	18	27	trachea	trachea	NN
cord-004751-4vl0cvyq	18	28	and	and	CC
cord-004751-4vl0cvyq	18	29	once	once	RB
cord-004751-4vl0cvyq	18	30	in	in	IN
cord-004751-4vl0cvyq	18	31	leukosis	leukosis	NN
cord-004751-4vl0cvyq	18	32	free	free	JJ
cord-004751-4vl0cvyq	18	33	eggs	egg	NNS
cord-004751-4vl0cvyq	18	34	,	,	,
cord-004751-4vl0cvyq	18	35	and	and	CC
cord-004751-4vl0cvyq	18	36	a	a	DT
cord-004751-4vl0cvyq	18	37	Hong	Hong	NNP
cord-004751-4vl0cvyq	18	38	Kong	Kong	NNP
cord-004751-4vl0cvyq	18	39	variant	variant	NN
cord-004751-4vl0cvyq	18	40	known	know	VBN
cord-004751-4vl0cvyq	18	41	as	as	IN
cord-004751-4vl0cvyq	18	42	A	A	NNP
cord-004751-4vl0cvyq	18	43	/	/	SYM
cord-004751-4vl0cvyq	18	44	England/939/69	England/939/69	NNP
cord-004751-4vl0cvyq	18	45	(	(	-LRB-
cord-004751-4vl0cvyq	18	46	H	H	NNP
cord-004751-4vl0cvyq	18	47	3	3	CD
cord-004751-4vl0cvyq	18	48	N2)which	n2)which	NN
cord-004751-4vl0cvyq	18	49	had	have	VBD
cord-004751-4vl0cvyq	18	50	been	be	VBN
cord-004751-4vl0cvyq	18	51	isolated	isolate	VBN
cord-004751-4vl0cvyq	18	52	in	in	IN
cord-004751-4vl0cvyq	18	53	leukosis	leukosis	NN
cord-004751-4vl0cvyq	18	54	-	-	HYPH
cord-004751-4vl0cvyq	18	55	free	free	JJ
cord-004751-4vl0cvyq	18	56	eggs	egg	NNS
cord-004751-4vl0cvyq	18	57	from	from	IN
cord-004751-4vl0cvyq	18	58	an	an	DT
cord-004751-4vl0cvyq	18	59	influenza	influenza	NN
cord-004751-4vl0cvyq	18	60	patient	patient	NN
cord-004751-4vl0cvyq	18	61	.	.	.
cord-004751-4vl0cvyq	19	1	Two	two	CD
cord-004751-4vl0cvyq	19	2	cloned	clone	VBN
cord-004751-4vl0cvyq	19	3	recombinants	recombinant	NNS
cord-004751-4vl0cvyq	19	4	of	of	IN
cord-004751-4vl0cvyq	19	5	939	939	CD
cord-004751-4vl0cvyq	19	6	•	•	NNS
cord-004751-4vl0cvyq	20	1	PR	PR	NNP
cord-004751-4vl0cvyq	20	2	8	8	CD
cord-004751-4vl0cvyq	20	3	were	be	VBD
cord-004751-4vl0cvyq	20	4	also	also	RB
cord-004751-4vl0cvyq	20	5	provided	provide	VBN
cord-004751-4vl0cvyq	20	6	for	for	IN
cord-004751-4vl0cvyq	20	7	testing	testing	NN
cord-004751-4vl0cvyq	20	8	.	.	.
cord-004751-4vl0cvyq	21	1	These	these	DT
cord-004751-4vl0cvyq	21	2	had	have	VBD
cord-004751-4vl0cvyq	21	3	been	be	VBN
cord-004751-4vl0cvyq	21	4	prepared	prepare	VBN
cord-004751-4vl0cvyq	21	5	from	from	IN
cord-004751-4vl0cvyq	21	6	the	the	DT
cord-004751-4vl0cvyq	21	7	above	above	JJ
cord-004751-4vl0cvyq	21	8	parents	parent	NNS
cord-004751-4vl0cvyq	21	9	by	by	IN
cord-004751-4vl0cvyq	21	10	Dr.	Dr.	NNP
cord-004751-4vl0cvyq	21	11	D.	D.	NNP
cord-004751-4vl0cvyq	21	12	McCahon	McCahon	NNP
cord-004751-4vl0cvyq	21	13	and	and	CC
cord-004751-4vl0cvyq	21	14	Dr.	Dr.	NNP
cord-004751-4vl0cvyq	21	15	G.	G.	NNP
cord-004751-4vl0cvyq	21	16	C.	C.	NNP
cord-004751-4vl0cvyq	21	17	Schild	Schild	NNP
cord-004751-4vl0cvyq	21	18	of	of	IN
cord-004751-4vl0cvyq	21	19	the	the	DT
cord-004751-4vl0cvyq	21	20	National	National	NNP
cord-004751-4vl0cvyq	21	21	Institute	Institute	NNP
cord-004751-4vl0cvyq	21	22	for	for	IN
cord-004751-4vl0cvyq	21	23	Medical	Medical	NNP
cord-004751-4vl0cvyq	21	24	Research	Research	NNP
cord-004751-4vl0cvyq	21	25	by	by	IN
cord-004751-4vl0cvyq	21	26	methods	method	NNS
cord-004751-4vl0cvyq	21	27	previously	previously	RB
cord-004751-4vl0cvyq	21	28	described	describe	VBN
cord-004751-4vl0cvyq	21	29	(	(	-LRB-
cord-004751-4vl0cvyq	21	30	MeCAI	MeCAI	NNP
cord-004751-4vl0cvyq	21	31	~	~	NFP
cord-004751-4vl0cvyq	21	32	OX	OX	NNP
cord-004751-4vl0cvyq	21	33	and	and	CC
cord-004751-4vl0cvyq	21	34	SCmLD	SCmLD	NNP
cord-004751-4vl0cvyq	21	35	,	,	,
cord-004751-4vl0cvyq	21	36	1972	1972	CD
cord-004751-4vl0cvyq	21	37	)	)	-RRB-
cord-004751-4vl0cvyq	21	38	.	.	.
cord-004751-4vl0cvyq	22	1	Finally	finally	RB
cord-004751-4vl0cvyq	22	2	,	,	,
cord-004751-4vl0cvyq	22	3	two	two	CD
cord-004751-4vl0cvyq	22	4	strains	strain	NNS
cord-004751-4vl0cvyq	22	5	of	of	IN
cord-004751-4vl0cvyq	22	6	A	a	NN
cord-004751-4vl0cvyq	22	7	/	/	SYM
cord-004751-4vl0cvyq	22	8	England/501/68	england/501/68	NN
cord-004751-4vl0cvyq	22	9	(	(	-LRB-
cord-004751-4vl0cvyq	22	10	H2N	H2N	NNP
cord-004751-4vl0cvyq	22	11	2	2	CD
cord-004751-4vl0cvyq	22	12	)	)	-RRB-
cord-004751-4vl0cvyq	22	13	were	be	VBD
cord-004751-4vl0cvyq	22	14	also	also	RB
cord-004751-4vl0cvyq	22	15	tested	test	VBN
cord-004751-4vl0cvyq	22	16	.	.	.
cord-004751-4vl0cvyq	23	1	These	these	DT
cord-004751-4vl0cvyq	23	2	were	be	VBD
cord-004751-4vl0cvyq	23	3	an	an	DT
cord-004751-4vl0cvyq	23	4	unmodified	unmodified	JJ
cord-004751-4vl0cvyq	23	5	inhibitor	inhibitor	NN
cord-004751-4vl0cvyq	23	6	sensitive	sensitive	JJ
cord-004751-4vl0cvyq	23	7	strain	strain	NN
cord-004751-4vl0cvyq	23	8	(	(	-LRB-
cord-004751-4vl0cvyq	23	9	IS	be	VBZ
cord-004751-4vl0cvyq	23	10	501	501	CD
cord-004751-4vl0cvyq	23	11	)	)	-RRB-
cord-004751-4vl0cvyq	23	12	and	and	CC
cord-004751-4vl0cvyq	23	13	an	an	DT
cord-004751-4vl0cvyq	23	14	inhibitor	inhibitor	NN
cord-004751-4vl0cvyq	23	15	resistant	resistant	JJ
cord-004751-4vl0cvyq	23	16	strain	strain	NN
cord-004751-4vl0cvyq	23	17	(	(	-LRB-
cord-004751-4vl0cvyq	23	18	IR	IR	NNP
cord-004751-4vl0cvyq	23	19	501	501	CD
cord-004751-4vl0cvyq	23	20	)	)	-RRB-
cord-004751-4vl0cvyq	23	21	which	which	WDT
cord-004751-4vl0cvyq	23	22	had	have	VBD
cord-004751-4vl0cvyq	23	23	received	receive	VBN
cord-004751-4vl0cvyq	23	24	several	several	JJ
cord-004751-4vl0cvyq	23	25	passages	passage	NNS
cord-004751-4vl0cvyq	23	26	at	at	IN
cord-004751-4vl0cvyq	23	27	25	25	CD
cord-004751-4vl0cvyq	24	1	~	~	NFP
cord-004751-4vl0cvyq	24	2	C.	C.	NNP
cord-004751-4vl0cvyq	24	3	The	the	DT
cord-004751-4vl0cvyq	24	4	method	method	NN
cord-004751-4vl0cvyq	24	5	is	be	VBZ
cord-004751-4vl0cvyq	24	6	a	a	DT
cord-004751-4vl0cvyq	24	7	modification	modification	NN
cord-004751-4vl0cvyq	24	8	of	of	IN
cord-004751-4vl0cvyq	24	9	those	those	DT
cord-004751-4vl0cvyq	24	10	used	use	VBN
cord-004751-4vl0cvyq	24	11	by	by	IN
cord-004751-4vl0cvyq	24	12	others	other	NNS
cord-004751-4vl0cvyq	24	13	(	(	-LRB-
cord-004751-4vl0cvyq	25	1	CHEa•Y	CHEa•Y	NNP
cord-004751-4vl0cvyq	25	2	and	and	CC
cord-004751-4vl0cvyq	25	3	TAYLOI~-ROBInSOn	TAYLOI~-ROBInSOn	NNP
cord-004751-4vl0cvyq	25	4	,	,	,
cord-004751-4vl0cvyq	25	5	1970	1970	CD
cord-004751-4vl0cvyq	25	6	;	;	:
cord-004751-4vl0cvyq	25	7	H.~R	H.~R	NNP
cord-004751-4vl0cvyq	25	8	~	~	NFP
cord-004751-4vl0cvyq	25	9	ETT	ETT	NNP
cord-004751-4vl0cvyq	25	10	and	and	CC
cord-004751-4vl0cvyq	25	11	HOO]?E	HOO]?E	NNP
cord-004751-4vl0cvyq	25	12	~	~	NFP
cord-004751-4vl0cvyq	25	13	I	i	NN
cord-004751-4vl0cvyq	25	14	1968	1968	CD
cord-004751-4vl0cvyq	25	15	;	;	:
cord-004751-4vl0cvyq	25	16	HOOR	HOOR	NNP
cord-004751-4vl0cvyq	25	17	~	~	NFP
cord-004751-4vl0cvyq	25	18	r	r	NN
cord-004751-4vl0cvyq	25	19	and	and	CC
cord-004751-4vl0cvyq	25	20	TYRI	TYRI	NNP
cord-004751-4vl0cvyq	25	21	~	~	NFP
cord-004751-4vl0cvyq	25	22	ELru	ELru	NNP
cord-004751-4vl0cvyq	25	23	,	,	,
cord-004751-4vl0cvyq	25	24	1969	1969	CD
cord-004751-4vl0cvyq	25	25	)	)	-RRB-
cord-004751-4vl0cvyq	25	26	.	.	.
cord-004751-4vl0cvyq	26	1	Tracheau	Tracheau	NNP
cord-004751-4vl0cvyq	26	2	from	from	IN
cord-004751-4vl0cvyq	26	3	human	human	JJ
cord-004751-4vl0cvyq	26	4	embryos	embryo	NNS
cord-004751-4vl0cvyq	26	5	were	be	VBD
cord-004751-4vl0cvyq	26	6	provided	provide	VBN
cord-004751-4vl0cvyq	26	7	by	by	IN
cord-004751-4vl0cvyq	26	8	the	the	DT
cord-004751-4vl0cvyq	26	9	Royal	Royal	NNP
cord-004751-4vl0cvyq	26	10	Marsden	Marsden	NNP
cord-004751-4vl0cvyq	26	11	Hospital	Hospital	NNP
cord-004751-4vl0cvyq	26	12	tissue	tissue	NN
cord-004751-4vl0cvyq	26	13	bank	bank	NN
cord-004751-4vl0cvyq	26	14	.	.	.
cord-004751-4vl0cvyq	27	1	Foetal	foetal	JJ
cord-004751-4vl0cvyq	27	2	age	age	NN
cord-004751-4vl0cvyq	27	3	varied	vary	VBD
cord-004751-4vl0cvyq	27	4	15	15	CD
cord-004751-4vl0cvyq	27	5	to	to	TO
cord-004751-4vl0cvyq	27	6	24	24	CD
cord-004751-4vl0cvyq	27	7	weeks	week	NNS
cord-004751-4vl0cvyq	27	8	.	.	.
cord-004751-4vl0cvyq	28	1	After	after	IN
cord-004751-4vl0cvyq	28	2	transportation	transportation	NN
cord-004751-4vl0cvyq	28	3	on	on	IN
cord-004751-4vl0cvyq	28	4	ice	ice	NN
cord-004751-4vl0cvyq	28	5	in	in	IN
cord-004751-4vl0cvyq	28	6	Parker	Parker	NNP
cord-004751-4vl0cvyq	28	7	's	's	POS
cord-004751-4vl0cvyq	28	8	199	199	CD
cord-004751-4vl0cvyq	28	9	medium	medium	NN
cord-004751-4vl0cvyq	28	10	to	to	IN
cord-004751-4vl0cvyq	28	11	the	the	DT
cord-004751-4vl0cvyq	28	12	laboratory	laboratory	NN
cord-004751-4vl0cvyq	28	13	,	,	,
cord-004751-4vl0cvyq	28	14	the	the	DT
cord-004751-4vl0cvyq	28	15	tracheas	trachea	NNS
cord-004751-4vl0cvyq	28	16	were	be	VBD
cord-004751-4vl0cvyq	28	17	dissected	dissect	VBN
cord-004751-4vl0cvyq	28	18	free	free	JJ
cord-004751-4vl0cvyq	28	19	of	of	IN
cord-004751-4vl0cvyq	28	20	connective	connective	JJ
cord-004751-4vl0cvyq	28	21	tissue	tissue	NN
cord-004751-4vl0cvyq	28	22	.	.	.
cord-004751-4vl0cvyq	29	1	Complete	complete	JJ
cord-004751-4vl0cvyq	29	2	rings	ring	NNS
cord-004751-4vl0cvyq	29	3	were	be	VBD
cord-004751-4vl0cvyq	29	4	prepared	prepare	VBN
cord-004751-4vl0cvyq	29	5	by	by	IN
cord-004751-4vl0cvyq	29	6	cutting	cut	VBG
cord-004751-4vl0cvyq	29	7	transversely	transversely	RB
cord-004751-4vl0cvyq	29	8	between	between	IN
cord-004751-4vl0cvyq	29	9	the	the	DT
cord-004751-4vl0cvyq	29	10	tracheal	tracheal	JJ
cord-004751-4vl0cvyq	29	11	cartilages	cartilage	NNS
cord-004751-4vl0cvyq	29	12	in	in	IN
cord-004751-4vl0cvyq	29	13	a	a	DT
cord-004751-4vl0cvyq	29	14	Petri	Petri	NNP
cord-004751-4vl0cvyq	29	15	dish	dish	NN
cord-004751-4vl0cvyq	29	16	supported	support	VBN
cord-004751-4vl0cvyq	29	17	on	on	IN
cord-004751-4vl0cvyq	29	18	a	a	DT
cord-004751-4vl0cvyq	29	19	plastic	plastic	JJ
cord-004751-4vl0cvyq	29	20	platform	platform	NN
cord-004751-4vl0cvyq	29	21	containing	contain	VBG
cord-004751-4vl0cvyq	29	22	a	a	DT
cord-004751-4vl0cvyq	29	23	light	light	JJ
cord-004751-4vl0cvyq	29	24	source	source	NN
cord-004751-4vl0cvyq	29	25	.	.	.
cord-004751-4vl0cvyq	30	1	The	the	DT
cord-004751-4vl0cvyq	30	2	rings	ring	NNS
cord-004751-4vl0cvyq	30	3	(	(	-LRB-
cord-004751-4vl0cvyq	30	4	8	8	CD
cord-004751-4vl0cvyq	30	5	-	-	HYPH
cord-004751-4vl0cvyq	30	6	-12	-12	NN
cord-004751-4vl0cvyq	30	7	per	per	IN
cord-004751-4vl0cvyq	30	8	embryo	embryo	NN
cord-004751-4vl0cvyq	30	9	)	)	-RRB-
cord-004751-4vl0cvyq	30	10	were	be	VBD
cord-004751-4vl0cvyq	30	11	carefully	carefully	RB
cord-004751-4vl0cvyq	30	12	transferred	transfer	VBN
cord-004751-4vl0cvyq	30	13	to	to	IN
cord-004751-4vl0cvyq	30	14	sterile	sterile	JJ
cord-004751-4vl0cvyq	30	15	screw	screw	JJ
cord-004751-4vl0cvyq	30	16	-	-	HYPH
cord-004751-4vl0cvyq	30	17	top	top	NN
cord-004751-4vl0cvyq	30	18	tubes	tube	NNS
cord-004751-4vl0cvyq	30	19	(	(	-LRB-
cord-004751-4vl0cvyq	30	20	Flow	flow	NN
cord-004751-4vl0cvyq	30	21	Laboratories	Laboratories	NNPS
cord-004751-4vl0cvyq	30	22	)	)	-RRB-
cord-004751-4vl0cvyq	30	23	containing	contain	VBG
cord-004751-4vl0cvyq	30	24	I	-PRON-	PRP
cord-004751-4vl0cvyq	30	25	ml	ml	NNP
cord-004751-4vl0cvyq	30	26	of	of	IN
cord-004751-4vl0cvyq	30	27	L-15	L-15	NNP
cord-004751-4vl0cvyq	30	28	medium	medium	NN
cord-004751-4vl0cvyq	30	29	(	(	-LRB-
cord-004751-4vl0cvyq	30	30	LEIBOWTZ	LEIBOWTZ	NNP
cord-004751-4vl0cvyq	30	31	,	,	,
cord-004751-4vl0cvyq	30	32	1963	1963	CD
cord-004751-4vl0cvyq	30	33	)	)	-RRB-
cord-004751-4vl0cvyq	30	34	to	to	TO
cord-004751-4vl0cvyq	30	35	which	which	WDT
cord-004751-4vl0cvyq	30	36	had	have	VBD
cord-004751-4vl0cvyq	30	37	been	be	VBN
cord-004751-4vl0cvyq	30	38	added	add	VBN
cord-004751-4vl0cvyq	30	39	i	i	PRP
cord-004751-4vl0cvyq	30	40	per	per	IN
cord-004751-4vl0cvyq	30	41	cent	cent	NN
cord-004751-4vl0cvyq	30	42	L	l	NN
cord-004751-4vl0cvyq	30	43	-	-	HYPH
cord-004751-4vl0cvyq	30	44	glutamine	glutamine	NN
cord-004751-4vl0cvyq	30	45	(	(	-LRB-
cord-004751-4vl0cvyq	30	46	final	final	JJ
cord-004751-4vl0cvyq	30	47	concentration	concentration	NN
cord-004751-4vl0cvyq	30	48	)	)	-RRB-
cord-004751-4vl0cvyq	30	49	,	,	,
cord-004751-4vl0cvyq	30	50	I00	I00	NNP
cord-004751-4vl0cvyq	30	51	units	unit	NNS
cord-004751-4vl0cvyq	30	52	of	of	IN
cord-004751-4vl0cvyq	30	53	penicillin	penicillin	NN
cord-004751-4vl0cvyq	30	54	,	,	,
cord-004751-4vl0cvyq	30	55	and	and	CC
cord-004751-4vl0cvyq	30	56	100~g	100~g	CD
cord-004751-4vl0cvyq	30	57	streptomycin	streptomycin	NNS
cord-004751-4vl0cvyq	30	58	.	.	.
cord-004751-4vl0cvyq	31	1	Ferrets	ferret	NNS
cord-004751-4vl0cvyq	31	2	were	be	VBD
cord-004751-4vl0cvyq	31	3	given	give	VBN
cord-004751-4vl0cvyq	31	4	a	a	DT
cord-004751-4vl0cvyq	31	5	lethal	lethal	JJ
cord-004751-4vl0cvyq	31	6	dose	dose	NN
cord-004751-4vl0cvyq	31	7	of	of	IN
cord-004751-4vl0cvyq	31	8	sodium	sodium	NN
cord-004751-4vl0cvyq	31	9	pentothal	pentothal	NN
cord-004751-4vl0cvyq	31	10	.	.	.
cord-004751-4vl0cvyq	32	1	The	the	DT
cord-004751-4vl0cvyq	32	2	skin	skin	NN
cord-004751-4vl0cvyq	32	3	was	be	VBD
cord-004751-4vl0cvyq	32	4	dissected	dissect	VBN
cord-004751-4vl0cvyq	32	5	free	free	JJ
cord-004751-4vl0cvyq	32	6	over	over	IN
cord-004751-4vl0cvyq	32	7	the	the	DT
cord-004751-4vl0cvyq	32	8	abdomen	abdomen	NN
cord-004751-4vl0cvyq	32	9	and	and	CC
cord-004751-4vl0cvyq	32	10	pulled	pull	VBD
cord-004751-4vl0cvyq	32	11	upwards	upwards	RB
cord-004751-4vl0cvyq	32	12	and	and	CC
cord-004751-4vl0cvyq	32	13	over	over	IN
cord-004751-4vl0cvyq	32	14	the	the	DT
cord-004751-4vl0cvyq	32	15	head	head	NN
cord-004751-4vl0cvyq	32	16	to	to	TO
cord-004751-4vl0cvyq	32	17	provide	provide	VB
cord-004751-4vl0cvyq	32	18	a	a	DT
cord-004751-4vl0cvyq	32	19	sterile	sterile	JJ
cord-004751-4vl0cvyq	32	20	environment	environment	NN
cord-004751-4vl0cvyq	32	21	over	over	IN
cord-004751-4vl0cvyq	32	22	the	the	DT
cord-004751-4vl0cvyq	32	23	trachea	trachea	NN
cord-004751-4vl0cvyq	32	24	.	.	.
cord-004751-4vl0cvyq	33	1	The	the	DT
cord-004751-4vl0cvyq	33	2	trachea	trachea	NN
cord-004751-4vl0cvyq	33	3	was	be	VBD
cord-004751-4vl0cvyq	33	4	dissected	dissect	VBN
cord-004751-4vl0cvyq	33	5	free	free	JJ
cord-004751-4vl0cvyq	33	6	of	of	IN
cord-004751-4vl0cvyq	33	7	connective	connective	JJ
cord-004751-4vl0cvyq	33	8	tissue	tissue	NN
cord-004751-4vl0cvyq	33	9	,	,	,
cord-004751-4vl0cvyq	33	10	removed	remove	VBN
cord-004751-4vl0cvyq	33	11	,	,	,
cord-004751-4vl0cvyq	33	12	placed	place	VBN
cord-004751-4vl0cvyq	33	13	in	in	IN
cord-004751-4vl0cvyq	33	14	medium	medium	NN
cord-004751-4vl0cvyq	33	15	,	,	,
cord-004751-4vl0cvyq	33	16	and	and	CC
cord-004751-4vl0cvyq	33	17	handled	handle	VBN
cord-004751-4vl0cvyq	33	18	as	as	IN
cord-004751-4vl0cvyq	33	19	above	above	RB
cord-004751-4vl0cvyq	33	20	.	.	.
cord-004751-4vl0cvyq	34	1	After	after	IN
cord-004751-4vl0cvyq	34	2	positioning	position	VBG
cord-004751-4vl0cvyq	34	3	on	on	IN
cord-004751-4vl0cvyq	34	4	the	the	DT
cord-004751-4vl0cvyq	34	5	side	side	NN
cord-004751-4vl0cvyq	34	6	of	of	IN
cord-004751-4vl0cvyq	34	7	the	the	DT
cord-004751-4vl0cvyq	34	8	tube	tube	NN
cord-004751-4vl0cvyq	34	9	opposite	opposite	IN
cord-004751-4vl0cvyq	34	10	the	the	DT
cord-004751-4vl0cvyq	34	11	medium	medium	NN
cord-004751-4vl0cvyq	34	12	,	,	,
cord-004751-4vl0cvyq	34	13	the	the	DT
cord-004751-4vl0cvyq	34	14	percentage	percentage	NN
cord-004751-4vl0cvyq	34	15	of	of	IN
cord-004751-4vl0cvyq	34	16	each	each	DT
cord-004751-4vl0cvyq	34	17	ring	ring	NN
cord-004751-4vl0cvyq	34	18	beating	beating	NN
cord-004751-4vl0cvyq	34	19	was	be	VBD
cord-004751-4vl0cvyq	34	20	estimated	estimate	VBN
cord-004751-4vl0cvyq	34	21	using	use	VBG
cord-004751-4vl0cvyq	34	22	transmitted	transmit	VBN
cord-004751-4vl0cvyq	34	23	light	light	NN
cord-004751-4vl0cvyq	34	24	and	and	CC
cord-004751-4vl0cvyq	34	25	the	the	DT
cord-004751-4vl0cvyq	34	26	low	low	JJ
cord-004751-4vl0cvyq	34	27	power	power	NN
cord-004751-4vl0cvyq	34	28	objective	objective	NN
cord-004751-4vl0cvyq	34	29	of	of	IN
cord-004751-4vl0cvyq	34	30	an	an	DT
cord-004751-4vl0cvyq	34	31	ordinary	ordinary	JJ
cord-004751-4vl0cvyq	34	32	microscope	microscope	NN
cord-004751-4vl0cvyq	34	33	.	.	.
cord-004751-4vl0cvyq	35	1	Differences	difference	NNS
cord-004751-4vl0cvyq	35	2	in	in	IN
cord-004751-4vl0cvyq	35	3	the	the	DT
cord-004751-4vl0cvyq	35	4	vigour	vigour	NN
cord-004751-4vl0cvyq	35	5	and	and	CC
cord-004751-4vl0cvyq	35	6	speed	speed	NN
cord-004751-4vl0cvyq	35	7	with	with	IN
cord-004751-4vl0cvyq	35	8	which	which	WDT
cord-004751-4vl0cvyq	35	9	the	the	DT
cord-004751-4vl0cvyq	35	10	cilia	cilia	NN
cord-004751-4vl0cvyq	35	11	beat	beat	VBP
cord-004751-4vl0cvyq	35	12	were	be	VBD
cord-004751-4vl0cvyq	35	13	discernible	discernible	JJ
cord-004751-4vl0cvyq	35	14	,	,	,
cord-004751-4vl0cvyq	35	15	but	but	CC
cord-004751-4vl0cvyq	35	16	these	these	DT
cord-004751-4vl0cvyq	35	17	were	be	VBD
cord-004751-4vl0cvyq	35	18	ignored	ignore	VBN
cord-004751-4vl0cvyq	35	19	.	.	.
cord-004751-4vl0cvyq	36	1	Readings	reading	NNS
cord-004751-4vl0cvyq	36	2	were	be	VBD
cord-004751-4vl0cvyq	36	3	recorded	record	VBN
cord-004751-4vl0cvyq	36	4	by	by	IN
cord-004751-4vl0cvyq	36	5	the	the	DT
cord-004751-4vl0cvyq	36	6	same	same	JJ
cord-004751-4vl0cvyq	36	7	observer	observer	NN
cord-004751-4vl0cvyq	36	8	(	(	-LRB-
cord-004751-4vl0cvyq	36	9	SRM	SRM	NNP
cord-004751-4vl0cvyq	36	10	)	)	-RRB-
cord-004751-4vl0cvyq	36	11	each	each	DT
cord-004751-4vl0cvyq	36	12	day	day	NN
cord-004751-4vl0cvyq	36	13	.	.	.
cord-004751-4vl0cvyq	37	1	The	the	DT
cord-004751-4vl0cvyq	37	2	ferret	ferret	NN
cord-004751-4vl0cvyq	37	3	rings	ring	NNS
cord-004751-4vl0cvyq	37	4	,	,	,
cord-004751-4vl0cvyq	37	5	because	because	IN
cord-004751-4vl0cvyq	37	6	of	of	IN
cord-004751-4vl0cvyq	37	7	their	-PRON-	PRP$
cord-004751-4vl0cvyq	37	8	large	large	JJ
cord-004751-4vl0cvyq	37	9	size	size	NN
cord-004751-4vl0cvyq	37	10	,	,	,
cord-004751-4vl0cvyq	37	11	were	be	VBD
cord-004751-4vl0cvyq	37	12	read	read	VBN
cord-004751-4vl0cvyq	37	13	with	with	IN
cord-004751-4vl0cvyq	37	14	an	an	DT
cord-004751-4vl0cvyq	37	15	inverted	inverted	JJ
cord-004751-4vl0cvyq	37	16	microscope	microscope	NN
cord-004751-4vl0cvyq	37	17	.	.	.
cord-004751-4vl0cvyq	38	1	The	the	DT
cord-004751-4vl0cvyq	38	2	tissue	tissue	NN
cord-004751-4vl0cvyq	38	3	was	be	VBD
cord-004751-4vl0cvyq	38	4	rolled	roll	VBN
cord-004751-4vl0cvyq	38	5	for	for	IN
cord-004751-4vl0cvyq	38	6	24	24	CD
cord-004751-4vl0cvyq	38	7	-	-	HYPH
cord-004751-4vl0cvyq	38	8	-48	-48	NNP
cord-004751-4vl0cvyq	38	9	hours	hour	NNS
cord-004751-4vl0cvyq	38	10	before	before	IN
cord-004751-4vl0cvyq	38	11	inoculation	inoculation	NN
cord-004751-4vl0cvyq	38	12	with	with	IN
cord-004751-4vl0cvyq	38	13	virus	virus	NN
cord-004751-4vl0cvyq	38	14	to	to	TO
cord-004751-4vl0cvyq	38	15	remove	remove	VB
cord-004751-4vl0cvyq	38	16	free	free	JJ
cord-004751-4vl0cvyq	38	17	cells	cell	NNS
cord-004751-4vl0cvyq	38	18	and	and	CC
cord-004751-4vl0cvyq	38	19	mucus	mucus	NN
cord-004751-4vl0cvyq	38	20	.	.	.
cord-004751-4vl0cvyq	39	1	After	after	IN
cord-004751-4vl0cvyq	39	2	an	an	DT
cord-004751-4vl0cvyq	39	3	additional	additional	JJ
cord-004751-4vl0cvyq	39	4	medium	medium	NN
cord-004751-4vl0cvyq	39	5	change	change	NN
cord-004751-4vl0cvyq	39	6	,	,	,
cord-004751-4vl0cvyq	39	7	105EIDs0	105eids0	CD
cord-004751-4vl0cvyq	39	8	of	of	IN
cord-004751-4vl0cvyq	39	9	virus	virus	NN
cord-004751-4vl0cvyq	39	10	in	in	IN
cord-004751-4vl0cvyq	39	11	0.2	0.2	CD
cord-004751-4vl0cvyq	39	12	ml	ml	NNS
cord-004751-4vl0cvyq	39	13	was	be	VBD
cord-004751-4vl0cvyq	39	14	introduced	introduce	VBN
cord-004751-4vl0cvyq	39	15	into	into	IN
cord-004751-4vl0cvyq	39	16	the	the	DT
cord-004751-4vl0cvyq	39	17	tube	tube	NN
cord-004751-4vl0cvyq	39	18	which	which	WDT
cord-004751-4vl0cvyq	39	19	was	be	VBD
cord-004751-4vl0cvyq	39	20	then	then	RB
cord-004751-4vl0cvyq	39	21	rolled	roll	VBN
cord-004751-4vl0cvyq	39	22	continuously	continuously	RB
cord-004751-4vl0cvyq	39	23	at	at	IN
cord-004751-4vl0cvyq	39	24	33	33	CD
cord-004751-4vl0cvyq	39	25	~	~	NFP
cord-004751-4vl0cvyq	39	26	C.	C.	NNP
cord-004751-4vl0cvyq	39	27	The	the	DT
cord-004751-4vl0cvyq	39	28	virus	virus	NN
cord-004751-4vl0cvyq	39	29	was	be	VBD
cord-004751-4vl0cvyq	39	30	allowed	allow	VBN
cord-004751-4vl0cvyq	39	31	to	to	TO
cord-004751-4vl0cvyq	39	32	adsorb	adsorb	VB
cord-004751-4vl0cvyq	39	33	for	for	IN
cord-004751-4vl0cvyq	39	34	2	2	CD
cord-004751-4vl0cvyq	39	35	hours	hour	NNS
cord-004751-4vl0cvyq	39	36	and	and	CC
cord-004751-4vl0cvyq	39	37	then	then	RB
cord-004751-4vl0cvyq	39	38	the	the	DT
cord-004751-4vl0cvyq	39	39	tissue	tissue	NN
cord-004751-4vl0cvyq	39	40	was	be	VBD
cord-004751-4vl0cvyq	39	41	washed	wash	VBN
cord-004751-4vl0cvyq	39	42	three	three	CD
cord-004751-4vl0cvyq	39	43	times	time	NNS
cord-004751-4vl0cvyq	39	44	with	with	IN
cord-004751-4vl0cvyq	39	45	medium	medium	NN
cord-004751-4vl0cvyq	39	46	.	.	.
cord-004751-4vl0cvyq	40	1	At	at	IN
cord-004751-4vl0cvyq	40	2	24	24	CD
cord-004751-4vl0cvyq	40	3	hours	hour	NNS
cord-004751-4vl0cvyq	40	4	,	,	,
cord-004751-4vl0cvyq	40	5	and	and	CC
cord-004751-4vl0cvyq	40	6	thereafter	thereafter	RB
cord-004751-4vl0cvyq	40	7	every	every	DT
cord-004751-4vl0cvyq	40	8	48	48	CD
cord-004751-4vl0cvyq	40	9	hours	hour	NNS
cord-004751-4vl0cvyq	40	10	,	,	,
cord-004751-4vl0cvyq	40	11	the	the	DT
cord-004751-4vl0cvyq	40	12	tubes	tube	NNS
cord-004751-4vl0cvyq	40	13	were	be	VBD
cord-004751-4vl0cvyq	40	14	harvested	harvest	VBN
cord-004751-4vl0cvyq	40	15	and	and	CC
cord-004751-4vl0cvyq	40	16	fresh	fresh	JJ
cord-004751-4vl0cvyq	40	17	medium	medium	NN
cord-004751-4vl0cvyq	40	18	added	add	VBD
cord-004751-4vl0cvyq	40	19	.	.	.
cord-004751-4vl0cvyq	41	1	The	the	DT
cord-004751-4vl0cvyq	41	2	entire	entire	JJ
cord-004751-4vl0cvyq	41	3	1	1	CD
cord-004751-4vl0cvyq	41	4	ml	ml	NNS
cord-004751-4vl0cvyq	41	5	of	of	IN
cord-004751-4vl0cvyq	41	6	medium	medium	NN
cord-004751-4vl0cvyq	41	7	from	from	IN
cord-004751-4vl0cvyq	41	8	each	each	DT
cord-004751-4vl0cvyq	41	9	tube	tube	NN
cord-004751-4vl0cvyq	41	10	was	be	VBD
cord-004751-4vl0cvyq	41	11	removed	remove	VBN
cord-004751-4vl0cvyq	41	12	aseeptically	aseeptically	RB
cord-004751-4vl0cvyq	41	13	every	every	DT
cord-004751-4vl0cvyq	41	14	other	other	JJ
cord-004751-4vl0cvyq	41	15	day	day	NN
cord-004751-4vl0cvyq	41	16	for	for	IN
cord-004751-4vl0cvyq	41	17	the	the	DT
cord-004751-4vl0cvyq	41	18	first	first	JJ
cord-004751-4vl0cvyq	41	19	two	two	CD
cord-004751-4vl0cvyq	41	20	weeks	week	NNS
cord-004751-4vl0cvyq	41	21	and	and	CC
cord-004751-4vl0cvyq	41	22	mixed	mix	VBN
cord-004751-4vl0cvyq	41	23	with	with	IN
cord-004751-4vl0cvyq	41	24	an	an	DT
cord-004751-4vl0cvyq	41	25	equal	equal	JJ
cord-004751-4vl0cvyq	41	26	volume	volume	NN
cord-004751-4vl0cvyq	41	27	of	of	IN
cord-004751-4vl0cvyq	41	28	nutrient	nutrient	NN
cord-004751-4vl0cvyq	41	29	broth	broth	NN
cord-004751-4vl0cvyq	41	30	,	,	,
cord-004751-4vl0cvyq	41	31	pooled	pool	VBN
cord-004751-4vl0cvyq	41	32	,	,	,
cord-004751-4vl0cvyq	41	33	and	and	CC
cord-004751-4vl0cvyq	41	34	stored	store	VBN
cord-004751-4vl0cvyq	41	35	at	at	IN
cord-004751-4vl0cvyq	42	1	--70	--70	NNP
cord-004751-4vl0cvyq	43	1	~	~	NFP
cord-004751-4vl0cvyq	43	2	C.	C.	NNP
cord-004751-4vl0cvyq	43	3	Serial	serial	JJ
cord-004751-4vl0cvyq	43	4	10-fold	10-fold	JJ
cord-004751-4vl0cvyq	43	5	dilutions	dilution	NNS
cord-004751-4vl0cvyq	43	6	of	of	IN
cord-004751-4vl0cvyq	43	7	virus	virus	NN
cord-004751-4vl0cvyq	43	8	were	be	VBD
cord-004751-4vl0cvyq	43	9	injected	inject	VBN
cord-004751-4vl0cvyq	43	10	into	into	IN
cord-004751-4vl0cvyq	43	11	the	the	DT
cord-004751-4vl0cvyq	43	12	allantoic	allantoic	NNP
cord-004751-4vl0cvyq	43	13	cavity	cavity	NN
cord-004751-4vl0cvyq	43	14	of	of	IN
cord-004751-4vl0cvyq	43	15	groups	group	NNS
cord-004751-4vl0cvyq	43	16	of	of	IN
cord-004751-4vl0cvyq	43	17	three	three	CD
cord-004751-4vl0cvyq	43	18	10-day	10-day	CD
cord-004751-4vl0cvyq	43	19	embryonated	embryonate	VBN
cord-004751-4vl0cvyq	43	20	chicken	chicken	NN
cord-004751-4vl0cvyq	43	21	eggs	egg	NNS
cord-004751-4vl0cvyq	43	22	.	.	.
cord-004751-4vl0cvyq	44	1	After	after	IN
cord-004751-4vl0cvyq	44	2	incubation	incubation	NN
cord-004751-4vl0cvyq	44	3	at	at	IN
cord-004751-4vl0cvyq	44	4	33	33	CD
cord-004751-4vl0cvyq	44	5	~	~	CD
cord-004751-4vl0cvyq	44	6	C	c	NN
cord-004751-4vl0cvyq	44	7	for	for	IN
cord-004751-4vl0cvyq	44	8	48	48	CD
cord-004751-4vl0cvyq	44	9	to	to	TO
cord-004751-4vl0cvyq	44	10	72	72	CD
cord-004751-4vl0cvyq	44	11	hours	hour	NNS
cord-004751-4vl0cvyq	44	12	,	,	,
cord-004751-4vl0cvyq	44	13	the	the	DT
cord-004751-4vl0cvyq	44	14	allantoic	allantoic	NNP
cord-004751-4vl0cvyq	44	15	fluid	fluid	NN
cord-004751-4vl0cvyq	44	16	was	be	VBD
cord-004751-4vl0cvyq	44	17	harvested	harvest	VBN
cord-004751-4vl0cvyq	44	18	and	and	CC
cord-004751-4vl0cvyq	44	19	tested	test	VBN
cord-004751-4vl0cvyq	44	20	for	for	IN
cord-004751-4vl0cvyq	44	21	haemagglutinin	haemagglutinin	NNP
cord-004751-4vl0cvyq	44	22	(	(	-LRB-
cord-004751-4vl0cvyq	44	23	HA	HA	NNP
cord-004751-4vl0cvyq	44	24	)	)	-RRB-
cord-004751-4vl0cvyq	44	25	with	with	IN
cord-004751-4vl0cvyq	44	26	0.5	0.5	CD
cord-004751-4vl0cvyq	44	27	per	per	IN
cord-004751-4vl0cvyq	44	28	cent	cent	NN
cord-004751-4vl0cvyq	44	29	chicken	chicken	NN
cord-004751-4vl0cvyq	44	30	red	red	JJ
cord-004751-4vl0cvyq	44	31	blood	blood	NN
cord-004751-4vl0cvyq	44	32	cells	cell	NNS
cord-004751-4vl0cvyq	44	33	(	(	-LRB-
cord-004751-4vl0cvyq	44	34	RBC	RBC	NNP
cord-004751-4vl0cvyq	44	35	)	)	-RRB-
cord-004751-4vl0cvyq	44	36	.	.	.
cord-004751-4vl0cvyq	45	1	Titres	titre	NNS
cord-004751-4vl0cvyq	45	2	were	be	VBD
cord-004751-4vl0cvyq	45	3	expressed	express	VBN
cord-004751-4vl0cvyq	45	4	as	as	IN
cord-004751-4vl0cvyq	45	5	50	50	CD
cord-004751-4vl0cvyq	45	6	per	per	IN
cord-004751-4vl0cvyq	45	7	cent	cent	NN
cord-004751-4vl0cvyq	45	8	egg	egg	NN
cord-004751-4vl0cvyq	45	9	infectious	infectious	JJ
cord-004751-4vl0cvyq	45	10	doses	dose	NNS
cord-004751-4vl0cvyq	45	11	per	per	IN
cord-004751-4vl0cvyq	45	12	millilitre	millilitre	NN
cord-004751-4vl0cvyq	45	13	(	(	-LRB-
cord-004751-4vl0cvyq	45	14	EIDs0	EIDs0	NNP
cord-004751-4vl0cvyq	45	15	/	/	SYM
cord-004751-4vl0cvyq	45	16	ml	ml	NN
cord-004751-4vl0cvyq	45	17	)	)	-RRB-
cord-004751-4vl0cvyq	45	18	.	.	.
cord-004751-4vl0cvyq	46	1	Volunteers	volunteer	NNS
cord-004751-4vl0cvyq	46	2	were	be	VBD
cord-004751-4vl0cvyq	46	3	studied	study	VBN
cord-004751-4vl0cvyq	46	4	in	in	IN
cord-004751-4vl0cvyq	46	5	isolation	isolation	NN
cord-004751-4vl0cvyq	46	6	by	by	IN
cord-004751-4vl0cvyq	46	7	standard	standard	JJ
cord-004751-4vl0cvyq	46	8	methods	method	NNS
cord-004751-4vl0cvyq	46	9	as	as	RB
cord-004751-4vl0cvyq	46	10	already	already	RB
cord-004751-4vl0cvyq	46	11	described	describe	VBN
cord-004751-4vl0cvyq	46	12	(	(	-LRB-
cord-004751-4vl0cvyq	46	13	BEARE	BEARE	NNP
cord-004751-4vl0cvyq	46	14	and	and	CC
cord-004751-4vl0cvyq	46	15	HALL	HALL	NNP
cord-004751-4vl0cvyq	46	16	,	,	,
cord-004751-4vl0cvyq	46	17	1971	1971	CD
cord-004751-4vl0cvyq	46	18	)	)	-RRB-
cord-004751-4vl0cvyq	46	19	.	.	.
cord-004751-4vl0cvyq	47	1	The	the	DT
cord-004751-4vl0cvyq	47	2	number	number	NN
cord-004751-4vl0cvyq	47	3	of	of	IN
cord-004751-4vl0cvyq	47	4	days	day	NNS
cord-004751-4vl0cvyq	47	5	of	of	IN
cord-004751-4vl0cvyq	47	6	symptoms	symptom	NNS
cord-004751-4vl0cvyq	47	7	and	and	CC
cord-004751-4vl0cvyq	47	8	signs	sign	NNS
cord-004751-4vl0cvyq	47	9	above	above	IN
cord-004751-4vl0cvyq	47	10	a	a	DT
cord-004751-4vl0cvyq	47	11	baseline	baseline	NN
cord-004751-4vl0cvyq	47	12	were	be	VBD
cord-004751-4vl0cvyq	47	13	combined	combine	VBN
cord-004751-4vl0cvyq	47	14	to	to	TO
cord-004751-4vl0cvyq	47	15	provide	provide	VB
cord-004751-4vl0cvyq	47	16	a	a	DT
cord-004751-4vl0cvyq	47	17	symptom	symptom	NN
cord-004751-4vl0cvyq	47	18	score	score	NN
cord-004751-4vl0cvyq	47	19	.	.	.
cord-004751-4vl0cvyq	48	1	The	the	DT
cord-004751-4vl0cvyq	48	2	use	use	NN
cord-004751-4vl0cvyq	48	3	of	of	IN
cord-004751-4vl0cvyq	48	4	L-15	L-15	NNP
cord-004751-4vl0cvyq	48	5	medium	medium	NN
cord-004751-4vl0cvyq	48	6	and	and	CC
cord-004751-4vl0cvyq	48	7	rolling	roll	VBG
cord-004751-4vl0cvyq	48	8	the	the	DT
cord-004751-4vl0cvyq	48	9	screw	screw	NN
cord-004751-4vl0cvyq	48	10	-	-	HYPH
cord-004751-4vl0cvyq	48	11	topped	top	VBN
cord-004751-4vl0cvyq	48	12	tubes	tube	NNS
cord-004751-4vl0cvyq	48	13	prolonged	prolong	VBD
cord-004751-4vl0cvyq	48	14	the	the	DT
cord-004751-4vl0cvyq	48	15	survival	survival	NN
cord-004751-4vl0cvyq	48	16	of	of	IN
cord-004751-4vl0cvyq	48	17	the	the	DT
cord-004751-4vl0cvyq	48	18	ciliated	ciliated	JJ
cord-004751-4vl0cvyq	48	19	epithelium	epithelium	NN
cord-004751-4vl0cvyq	48	20	beyond	beyond	IN
cord-004751-4vl0cvyq	48	21	that	that	DT
cord-004751-4vl0cvyq	48	22	obtained	obtain	VBN
cord-004751-4vl0cvyq	48	23	using	use	VBG
cord-004751-4vl0cvyq	48	24	other	other	JJ
cord-004751-4vl0cvyq	48	25	standard	standard	JJ
cord-004751-4vl0cvyq	48	26	media	medium	NNS
cord-004751-4vl0cvyq	48	27	,	,	,
cord-004751-4vl0cvyq	48	28	and	and	CC
cord-004751-4vl0cvyq	48	29	,	,	,
cord-004751-4vl0cvyq	48	30	in	in	IN
cord-004751-4vl0cvyq	48	31	the	the	DT
cord-004751-4vl0cvyq	48	32	conditions	condition	NNS
cord-004751-4vl0cvyq	48	33	finally	finally	RB
cord-004751-4vl0cvyq	48	34	used	use	VBN
cord-004751-4vl0cvyq	48	35	,	,	,
cord-004751-4vl0cvyq	48	36	the	the	DT
cord-004751-4vl0cvyq	48	37	human	human	JJ
cord-004751-4vl0cvyq	48	38	embryo	embryo	NN
cord-004751-4vl0cvyq	48	39	trachea	trachea	NN
cord-004751-4vl0cvyq	48	40	regularly	regularly	RB
cord-004751-4vl0cvyq	48	41	survived	survive	VBD
cord-004751-4vl0cvyq	48	42	for	for	IN
cord-004751-4vl0cvyq	48	43	periods	period	NNS
cord-004751-4vl0cvyq	48	44	of	of	IN
cord-004751-4vl0cvyq	48	45	30	30	CD
cord-004751-4vl0cvyq	48	46	-	-	HYPH
cord-004751-4vl0cvyq	48	47	-50	-50	NN
cord-004751-4vl0cvyq	48	48	and	and	CC
cord-004751-4vl0cvyq	48	49	occasionally	occasionally	RB
cord-004751-4vl0cvyq	48	50	90	90	CD
cord-004751-4vl0cvyq	48	51	days	day	NNS
cord-004751-4vl0cvyq	48	52	.	.	.
cord-004751-4vl0cvyq	49	1	The	the	DT
cord-004751-4vl0cvyq	49	2	rings	ring	NNS
cord-004751-4vl0cvyq	49	3	tend	tend	VBP
cord-004751-4vl0cvyq	49	4	to	to	TO
cord-004751-4vl0cvyq	49	5	adhere	adhere	VB
cord-004751-4vl0cvyq	49	6	to	to	IN
cord-004751-4vl0cvyq	49	7	one	one	CD
cord-004751-4vl0cvyq	49	8	side	side	NN
cord-004751-4vl0cvyq	49	9	of	of	IN
cord-004751-4vl0cvyq	49	10	the	the	DT
cord-004751-4vl0cvyq	49	11	tube	tube	NN
cord-004751-4vl0cvyq	49	12	and	and	CC
cord-004751-4vl0cvyq	49	13	remain	remain	VB
cord-004751-4vl0cvyq	49	14	in	in	IN
cord-004751-4vl0cvyq	49	15	this	this	DT
cord-004751-4vl0cvyq	49	16	position	position	NN
cord-004751-4vl0cvyq	49	17	if	if	IN
cord-004751-4vl0cvyq	49	18	undisturbed	undisturbed	JJ
cord-004751-4vl0cvyq	49	19	.	.	.
cord-004751-4vl0cvyq	50	1	To	to	TO
cord-004751-4vl0cvyq	50	2	prevent	prevent	VB
cord-004751-4vl0cvyq	50	3	the	the	DT
cord-004751-4vl0cvyq	50	4	accumulation	accumulation	NN
cord-004751-4vl0cvyq	50	5	of	of	IN
cord-004751-4vl0cvyq	50	6	debris	debris	NN
cord-004751-4vl0cvyq	50	7	in	in	IN
cord-004751-4vl0cvyq	50	8	the	the	DT
cord-004751-4vl0cvyq	50	9	centre	centre	NN
cord-004751-4vl0cvyq	50	10	of	of	IN
cord-004751-4vl0cvyq	50	11	the	the	DT
cord-004751-4vl0cvyq	50	12	x'ing	x'ing	NN
cord-004751-4vl0cvyq	50	13	,	,	,
cord-004751-4vl0cvyq	50	14	thus	thus	RB
cord-004751-4vl0cvyq	50	15	obscuring	obscure	VBG
cord-004751-4vl0cvyq	50	16	the	the	DT
cord-004751-4vl0cvyq	50	17	cilia	cilia	NN
cord-004751-4vl0cvyq	50	18	,	,	,
cord-004751-4vl0cvyq	50	19	the	the	DT
cord-004751-4vl0cvyq	50	20	tubes	tube	NNS
cord-004751-4vl0cvyq	50	21	were	be	VBD
cord-004751-4vl0cvyq	50	22	shaken	shake	VBN
cord-004751-4vl0cvyq	50	23	gently	gently	RB
cord-004751-4vl0cvyq	50	24	each	each	DT
cord-004751-4vl0cvyq	50	25	day	day	NN
cord-004751-4vl0cvyq	50	26	.	.	.
cord-004751-4vl0cvyq	51	1	Occasionally	occasionally	RB
cord-004751-4vl0cvyq	51	2	it	-PRON-	PRP
cord-004751-4vl0cvyq	51	3	was	be	VBD
cord-004751-4vl0cvyq	51	4	necessary	necessary	JJ
cord-004751-4vl0cvyq	51	5	to	to	TO
cord-004751-4vl0cvyq	51	6	dislodge	dislodge	VB
cord-004751-4vl0cvyq	51	7	a	a	DT
cord-004751-4vl0cvyq	51	8	ring	ring	NN
cord-004751-4vl0cvyq	51	9	because	because	IN
cord-004751-4vl0cvyq	51	10	flbroblasts	flbroblast	NNS
cord-004751-4vl0cvyq	51	11	appeared	appear	VBD
cord-004751-4vl0cvyq	51	12	at	at	IN
cord-004751-4vl0cvyq	51	13	the	the	DT
cord-004751-4vl0cvyq	51	14	point	point	NN
cord-004751-4vl0cvyq	51	15	of	of	IN
cord-004751-4vl0cvyq	51	16	attachment	attachment	NN
cord-004751-4vl0cvyq	51	17	after	after	IN
cord-004751-4vl0cvyq	51	18	12	12	CD
cord-004751-4vl0cvyq	51	19	-	-	HYPH
cord-004751-4vl0cvyq	51	20	-14	-14	NN
cord-004751-4vl0cvyq	51	21	days	day	NNS
cord-004751-4vl0cvyq	51	22	and	and	CC
cord-004751-4vl0cvyq	51	23	obscured	obscure	VBD
cord-004751-4vl0cvyq	51	24	the	the	DT
cord-004751-4vl0cvyq	51	25	cilia	cilia	NN
cord-004751-4vl0cvyq	51	26	.	.	.
cord-004751-4vl0cvyq	52	1	Finally	finally	RB
cord-004751-4vl0cvyq	52	2	,	,	,
cord-004751-4vl0cvyq	52	3	after	after	IN
cord-004751-4vl0cvyq	52	4	preparation	preparation	NN
cord-004751-4vl0cvyq	52	5	of	of	IN
cord-004751-4vl0cvyq	52	6	the	the	DT
cord-004751-4vl0cvyq	52	7	rings	ring	NNS
cord-004751-4vl0cvyq	52	8	,	,	,
cord-004751-4vl0cvyq	52	9	there	there	EX
cord-004751-4vl0cvyq	52	10	was	be	VBD
cord-004751-4vl0cvyq	52	11	a	a	DT
cord-004751-4vl0cvyq	52	12	definite	definite	JJ
cord-004751-4vl0cvyq	52	13	improvement	improvement	NN
cord-004751-4vl0cvyq	52	14	of	of	IN
cord-004751-4vl0cvyq	52	15	the	the	DT
cord-004751-4vl0cvyq	52	16	ciliary	ciliary	NN
cord-004751-4vl0cvyq	52	17	activity	activity	NN
cord-004751-4vl0cvyq	52	18	over	over	IN
cord-004751-4vl0cvyq	52	19	the	the	DT
cord-004751-4vl0cvyq	52	20	first	first	JJ
cord-004751-4vl0cvyq	52	21	24	24	CD
cord-004751-4vl0cvyq	52	22	-	-	SYM
cord-004751-4vl0cvyq	52	23	-72	-72	CD
cord-004751-4vl0cvyq	52	24	hours	hour	NNS
cord-004751-4vl0cvyq	52	25	.	.	.
cord-004751-4vl0cvyq	53	1	Therefore	therefore	RB
cord-004751-4vl0cvyq	53	2	the	the	DT
cord-004751-4vl0cvyq	53	3	reading	reading	NN
cord-004751-4vl0cvyq	53	4	on	on	IN
cord-004751-4vl0cvyq	53	5	the	the	DT
cord-004751-4vl0cvyq	53	6	day	day	NN
cord-004751-4vl0cvyq	53	7	of	of	IN
cord-004751-4vl0cvyq	53	8	inoculation	inoculation	NN
cord-004751-4vl0cvyq	53	9	was	be	VBD
cord-004751-4vl0cvyq	53	10	used	use	VBN
cord-004751-4vl0cvyq	53	11	as	as	IN
cord-004751-4vl0cvyq	53	12	a	a	DT
cord-004751-4vl0cvyq	53	13	baseline	baseline	NN
cord-004751-4vl0cvyq	53	14	.	.	.
cord-004751-4vl0cvyq	54	1	It	-PRON-	PRP
cord-004751-4vl0cvyq	54	2	was	be	VBD
cord-004751-4vl0cvyq	54	3	frequently	frequently	RB
cord-004751-4vl0cvyq	54	4	impossible	impossible	JJ
cord-004751-4vl0cvyq	54	5	to	to	TO
cord-004751-4vl0cvyq	54	6	test	test	VB
cord-004751-4vl0cvyq	54	7	all	all	PDT
cord-004751-4vl0cvyq	54	8	the	the	DT
cord-004751-4vl0cvyq	54	9	viruses	virus	NNS
cord-004751-4vl0cvyq	54	10	in	in	IN
cord-004751-4vl0cvyq	54	11	the	the	DT
cord-004751-4vl0cvyq	54	12	trachea	trachea	NN
cord-004751-4vl0cvyq	54	13	from	from	IN
cord-004751-4vl0cvyq	54	14	the	the	DT
cord-004751-4vl0cvyq	54	15	same	same	JJ
cord-004751-4vl0cvyq	54	16	embryo	embryo	NN
cord-004751-4vl0cvyq	54	17	on	on	IN
cord-004751-4vl0cvyq	54	18	the	the	DT
cord-004751-4vl0cvyq	54	19	same	same	JJ
cord-004751-4vl0cvyq	54	20	day	day	NN
cord-004751-4vl0cvyq	54	21	,	,	,
cord-004751-4vl0cvyq	54	22	and	and	CC
cord-004751-4vl0cvyq	54	23	for	for	IN
cord-004751-4vl0cvyq	54	24	this	this	DT
cord-004751-4vl0cvyq	54	25	report	report	NN
cord-004751-4vl0cvyq	54	26	the	the	DT
cord-004751-4vl0cvyq	54	27	data	datum	NNS
cord-004751-4vl0cvyq	54	28	have	have	VBP
cord-004751-4vl0cvyq	54	29	been	be	VBN
cord-004751-4vl0cvyq	54	30	pooled	pool	VBN
cord-004751-4vl0cvyq	54	31	and	and	CC
cord-004751-4vl0cvyq	54	32	are	be	VBP
cord-004751-4vl0cvyq	54	33	based	base	VBN
cord-004751-4vl0cvyq	54	34	on	on	IN
cord-004751-4vl0cvyq	54	35	the	the	DT
cord-004751-4vl0cvyq	54	36	observation	observation	NN
cord-004751-4vl0cvyq	54	37	of	of	IN
cord-004751-4vl0cvyq	54	38	15	15	CD
cord-004751-4vl0cvyq	54	39	-	-	HYPH
cord-004751-4vl0cvyq	54	40	-20	-20	NN
cord-004751-4vl0cvyq	54	41	rings	ring	NNS
cord-004751-4vl0cvyq	54	42	infected	infect	VBN
cord-004751-4vl0cvyq	54	43	with	with	IN
cord-004751-4vl0cvyq	54	44	each	each	DT
cord-004751-4vl0cvyq	54	45	virus	virus	NN
cord-004751-4vl0cvyq	54	46	.	.	.
cord-004751-4vl0cvyq	55	1	Several	several	JJ
cord-004751-4vl0cvyq	55	2	uninoeulated	uninoeulate	VBN
cord-004751-4vl0cvyq	55	3	cultures	culture	NNS
cord-004751-4vl0cvyq	55	4	were	be	VBD
cord-004751-4vl0cvyq	55	5	included	include	VBN
cord-004751-4vl0cvyq	55	6	in	in	IN
cord-004751-4vl0cvyq	55	7	each	each	DT
cord-004751-4vl0cvyq	55	8	test	test	NN
cord-004751-4vl0cvyq	55	9	.	.	.
cord-004751-4vl0cvyq	56	1	As	as	IN
cord-004751-4vl0cvyq	56	2	shown	show	VBN
cord-004751-4vl0cvyq	56	3	in	in	IN
cord-004751-4vl0cvyq	56	4	Figure	figure	NN
cord-004751-4vl0cvyq	56	5	1	1	CD
cord-004751-4vl0cvyq	56	6	,	,	,
cord-004751-4vl0cvyq	56	7	the	the	DT
cord-004751-4vl0cvyq	56	8	ciliary	ciliary	NN
cord-004751-4vl0cvyq	56	9	activity	activity	NN
cord-004751-4vl0cvyq	56	10	in	in	IN
cord-004751-4vl0cvyq	56	11	cultures	culture	NNS
cord-004751-4vl0cvyq	56	12	infected	infect	VBN
cord-004751-4vl0cvyq	56	13	with	with	IN
cord-004751-4vl0cvyq	56	14	this	this	DT
cord-004751-4vl0cvyq	56	15	strain	strain	NN
cord-004751-4vl0cvyq	56	16	was	be	VBD
cord-004751-4vl0cvyq	56	17	the	the	DT
cord-004751-4vl0cvyq	56	18	same	same	JJ
cord-004751-4vl0cvyq	56	19	as	as	IN
cord-004751-4vl0cvyq	56	20	that	that	DT
cord-004751-4vl0cvyq	56	21	in	in	IN
cord-004751-4vl0cvyq	56	22	uninoculated	uninoculated	JJ
cord-004751-4vl0cvyq	56	23	tubes	tube	NNS
cord-004751-4vl0cvyq	56	24	and	and	CC
cord-004751-4vl0cvyq	56	25	in	in	IN
cord-004751-4vl0cvyq	56	26	fact	fact	NN
cord-004751-4vl0cvyq	56	27	the	the	DT
cord-004751-4vl0cvyq	56	28	cilia	cilia	NN
cord-004751-4vl0cvyq	56	29	in	in	IN
cord-004751-4vl0cvyq	56	30	some	some	DT
cord-004751-4vl0cvyq	56	31	inoculated	inoculate	VBN
cord-004751-4vl0cvyq	56	32	tubes	tube	NNS
cord-004751-4vl0cvyq	56	33	were	be	VBD
cord-004751-4vl0cvyq	56	34	more	more	RBR
cord-004751-4vl0cvyq	56	35	active	active	JJ
cord-004751-4vl0cvyq	56	36	than	than	IN
cord-004751-4vl0cvyq	56	37	in	in	IN
cord-004751-4vl0cvyq	56	38	controls	control	NNS
cord-004751-4vl0cvyq	56	39	.	.	.
cord-004751-4vl0cvyq	57	1	The	the	DT
cord-004751-4vl0cvyq	57	2	virus	virus	NN
cord-004751-4vl0cvyq	57	3	grew	grow	VBD
cord-004751-4vl0cvyq	57	4	to	to	IN
cord-004751-4vl0cvyq	57	5	low	low	JJ
cord-004751-4vl0cvyq	57	6	titre	titre	NN
cord-004751-4vl0cvyq	57	7	,	,	,
cord-004751-4vl0cvyq	57	8	as	as	IN
cord-004751-4vl0cvyq	57	9	shown	show	VBN
cord-004751-4vl0cvyq	57	10	in	in	IN
cord-004751-4vl0cvyq	57	11	Figure	figure	NN
cord-004751-4vl0cvyq	57	12	2	2	CD
cord-004751-4vl0cvyq	57	13	.	.	.
cord-004751-4vl0cvyq	58	1	3.1.2	3.1.2	LS
cord-004751-4vl0cvyq	58	2	.	.	.
cord-004751-4vl0cvyq	59	1	Virus	Virus	NNP
cord-004751-4vl0cvyq	59	2	Strain	Strain	NNP
cord-004751-4vl0cvyq	60	1	A	a	LS
cord-004751-4vl0cvyq	60	2	/	/	SYM
cord-004751-4vl0cvyq	60	3	Eng.~939~69	Eng.~939~69	NNP
cord-004751-4vl0cvyq	61	1	(	(	-LRB-
cord-004751-4vl0cvyq	61	2	H3N2	H3N2	NNP
cord-004751-4vl0cvyq	61	3	)	)	-RRB-
cord-004751-4vl0cvyq	62	1	This	this	DT
cord-004751-4vl0cvyq	62	2	strain	strain	NN
cord-004751-4vl0cvyq	62	3	,	,	,
cord-004751-4vl0cvyq	62	4	by	by	IN
cord-004751-4vl0cvyq	62	5	contrast	contrast	NN
cord-004751-4vl0cvyq	62	6	,	,	,
cord-004751-4vl0cvyq	62	7	regularly	regularly	RB
cord-004751-4vl0cvyq	62	8	destroyed	destroy	VBD
cord-004751-4vl0cvyq	62	9	ciliated	ciliated	JJ
cord-004751-4vl0cvyq	62	10	epithelium	epithelium	NN
cord-004751-4vl0cvyq	62	11	.	.	.
cord-004751-4vl0cvyq	63	1	The	the	DT
cord-004751-4vl0cvyq	63	2	earliest	early	JJS
cord-004751-4vl0cvyq	63	3	effects	effect	NNS
cord-004751-4vl0cvyq	63	4	,	,	,
cord-004751-4vl0cvyq	63	5	noticeable	noticeable	JJ
cord-004751-4vl0cvyq	63	6	by	by	IN
cord-004751-4vl0cvyq	63	7	the	the	DT
cord-004751-4vl0cvyq	63	8	third	third	JJ
cord-004751-4vl0cvyq	63	9	day	day	NN
cord-004751-4vl0cvyq	63	10	after	after	IN
cord-004751-4vl0cvyq	63	11	inoculation	inoculation	NN
cord-004751-4vl0cvyq	63	12	,	,	,
cord-004751-4vl0cvyq	63	13	were	be	VBD
cord-004751-4vl0cvyq	63	14	the	the	DT
cord-004751-4vl0cvyq	63	15	appearance	appearance	NN
cord-004751-4vl0cvyq	63	16	of	of	IN
cord-004751-4vl0cvyq	63	17	mucus	mucus	NN
cord-004751-4vl0cvyq	63	18	and	and	CC
cord-004751-4vl0cvyq	63	19	many	many	JJ
cord-004751-4vl0cvyq	63	20	desquamated	desquamate	VBN
cord-004751-4vl0cvyq	63	21	cells	cell	NNS
cord-004751-4vl0cvyq	63	22	within	within	IN
cord-004751-4vl0cvyq	63	23	the	the	DT
cord-004751-4vl0cvyq	63	24	ring	ring	NN
cord-004751-4vl0cvyq	63	25	.	.	.
cord-004751-4vl0cvyq	64	1	The	the	DT
cord-004751-4vl0cvyq	64	2	cilia	cilium	NNS
cord-004751-4vl0cvyq	64	3	of	of	IN
cord-004751-4vl0cvyq	64	4	some	some	DT
cord-004751-4vl0cvyq	64	5	of	of	IN
cord-004751-4vl0cvyq	64	6	these	these	DT
cord-004751-4vl0cvyq	64	7	shed	shed	VBN
cord-004751-4vl0cvyq	64	8	cells	cell	NNS
cord-004751-4vl0cvyq	64	9	continued	continue	VBD
cord-004751-4vl0cvyq	64	10	to	to	TO
cord-004751-4vl0cvyq	64	11	beat	beat	VB
cord-004751-4vl0cvyq	64	12	for	for	IN
cord-004751-4vl0cvyq	64	13	a	a	DT
cord-004751-4vl0cvyq	64	14	few	few	JJ
cord-004751-4vl0cvyq	64	15	hours	hour	NNS
cord-004751-4vl0cvyq	64	16	.	.	.
cord-004751-4vl0cvyq	65	1	At	at	IN
cord-004751-4vl0cvyq	65	2	this	this	DT
cord-004751-4vl0cvyq	65	3	time	time	NN
cord-004751-4vl0cvyq	65	4	the	the	DT
cord-004751-4vl0cvyq	65	5	ciliated	ciliated	JJ
cord-004751-4vl0cvyq	65	6	epithelium	epithelium	NN
cord-004751-4vl0cvyq	65	7	looked	look	VBD
cord-004751-4vl0cvyq	65	8	intact	intact	JJ
cord-004751-4vl0cvyq	65	9	,	,	,
cord-004751-4vl0cvyq	65	10	but	but	CC
cord-004751-4vl0cvyq	65	11	by	by	IN
cord-004751-4vl0cvyq	65	12	4	4	CD
cord-004751-4vl0cvyq	65	13	-	-	HYPH
cord-004751-4vl0cvyq	65	14	-6	-6	JJ
cord-004751-4vl0cvyq	65	15	days	day	NNS
cord-004751-4vl0cvyq	65	16	it	-PRON-	PRP
cord-004751-4vl0cvyq	65	17	was	be	VBD
cord-004751-4vl0cvyq	65	18	markedly	markedly	RB
cord-004751-4vl0cvyq	65	19	damaged	damage	VBN
cord-004751-4vl0cvyq	65	20	and	and	CC
cord-004751-4vl0cvyq	65	21	by	by	IN
cord-004751-4vl0cvyq	65	22	10	10	CD
cord-004751-4vl0cvyq	65	23	days	day	NNS
cord-004751-4vl0cvyq	65	24	ciliary	ciliary	NN
cord-004751-4vl0cvyq	65	25	activity	activity	NN
cord-004751-4vl0cvyq	65	26	had	have	VBD
cord-004751-4vl0cvyq	65	27	ceased	cease	VBN
cord-004751-4vl0cvyq	65	28	.	.	.
cord-004751-4vl0cvyq	66	1	Histological	histological	JJ
cord-004751-4vl0cvyq	66	2	sections	section	NNS
cord-004751-4vl0cvyq	66	3	showed	show	VBD
cord-004751-4vl0cvyq	66	4	that	that	IN
cord-004751-4vl0cvyq	66	5	the	the	DT
cord-004751-4vl0cvyq	66	6	epithelium	epithelium	NN
cord-004751-4vl0cvyq	66	7	was	be	VBD
cord-004751-4vl0cvyq	66	8	denuded	denude	VBN
cord-004751-4vl0cvyq	66	9	of	of	IN
cord-004751-4vl0cvyq	66	10	ciliated	ciliated	JJ
cord-004751-4vl0cvyq	66	11	cells	cell	NNS
cord-004751-4vl0cvyq	66	12	.	.	.
cord-004751-4vl0cvyq	67	1	In	in	IN
cord-004751-4vl0cvyq	67	2	a	a	DT
cord-004751-4vl0cvyq	67	3	few	few	JJ
cord-004751-4vl0cvyq	67	4	tracheas	trachea	NNS
cord-004751-4vl0cvyq	67	5	the	the	DT
cord-004751-4vl0cvyq	67	6	process	process	NN
cord-004751-4vl0cvyq	67	7	was	be	VBD
cord-004751-4vl0cvyq	67	8	delayed	delay	VBN
cord-004751-4vl0cvyq	67	9	by	by	IN
cord-004751-4vl0cvyq	67	10	two	two	CD
cord-004751-4vl0cvyq	67	11	or	or	CC
cord-004751-4vl0cvyq	67	12	three	three	CD
cord-004751-4vl0cvyq	67	13	days	day	NNS
cord-004751-4vl0cvyq	67	14	.	.	.
cord-004751-4vl0cvyq	68	1	The	the	DT
cord-004751-4vl0cvyq	68	2	growth	growth	NN
cord-004751-4vl0cvyq	68	3	of	of	IN
cord-004751-4vl0cvyq	68	4	virus	virus	NN
cord-004751-4vl0cvyq	68	5	preceded	precede	VBD
cord-004751-4vl0cvyq	68	6	the	the	DT
cord-004751-4vl0cvyq	68	7	destruction	destruction	NN
cord-004751-4vl0cvyq	68	8	of	of	IN
cord-004751-4vl0cvyq	68	9	the	the	DT
cord-004751-4vl0cvyq	68	10	ciliated	ciliated	JJ
cord-004751-4vl0cvyq	68	11	epithelium	epithelium	NN
cord-004751-4vl0cvyq	68	12	and	and	CC
cord-004751-4vl0cvyq	68	13	the	the	DT
cord-004751-4vl0cvyq	68	14	titre	titre	NN
cord-004751-4vl0cvyq	68	15	was	be	VBD
cord-004751-4vl0cvyq	68	16	the	the	DT
cord-004751-4vl0cvyq	68	17	highest	high	JJS
cord-004751-4vl0cvyq	68	18	of	of	IN
cord-004751-4vl0cvyq	68	19	any	any	DT
cord-004751-4vl0cvyq	68	20	virus	virus	NN
cord-004751-4vl0cvyq	68	21	tested	test	VBN
cord-004751-4vl0cvyq	68	22	(	(	-LRB-
cord-004751-4vl0cvyq	68	23	Fig	Fig	NNP
cord-004751-4vl0cvyq	68	24	.	.	NNP
cord-004751-4vl0cvyq	68	25	2	2	CD
cord-004751-4vl0cvyq	68	26	)	)	-RRB-
cord-004751-4vl0cvyq	68	27	.	.	.
cord-004751-4vl0cvyq	69	1	The	the	DT
cord-004751-4vl0cvyq	69	2	growth	growth	NN
cord-004751-4vl0cvyq	69	3	of	of	IN
cord-004751-4vl0cvyq	69	4	virus	virus	NN
cord-004751-4vl0cvyq	69	5	continued	continue	VBD
cord-004751-4vl0cvyq	69	6	at	at	IN
cord-004751-4vl0cvyq	69	7	a	a	DT
cord-004751-4vl0cvyq	69	8	low	low	JJ
cord-004751-4vl0cvyq	69	9	level	level	NN
cord-004751-4vl0cvyq	69	10	after	after	IN
cord-004751-4vl0cvyq	69	11	the	the	DT
cord-004751-4vl0cvyq	69	12	cilia	cilia	NN
cord-004751-4vl0cvyq	69	13	were	be	VBD
cord-004751-4vl0cvyq	69	14	destroyed	destroy	VBN
cord-004751-4vl0cvyq	69	15	and	and	CC
cord-004751-4vl0cvyq	69	16	was	be	VBD
cord-004751-4vl0cvyq	69	17	detected	detect	VBN
cord-004751-4vl0cvyq	69	18	at	at	IN
cord-004751-4vl0cvyq	69	19	titres	titre	NNS
cord-004751-4vl0cvyq	69	20	between	between	IN
cord-004751-4vl0cvyq	69	21	102	102	CD
cord-004751-4vl0cvyq	69	22	and	and	CC
cord-004751-4vl0cvyq	69	23	103	103	CD
cord-004751-4vl0cvyq	69	24	EIDs0	EIDs0	NNP
cord-004751-4vl0cvyq	69	25	/	/	SYM
cord-004751-4vl0cvyq	69	26	ml	ml	NN
cord-004751-4vl0cvyq	69	27	for	for	IN
cord-004751-4vl0cvyq	69	28	up	up	IN
cord-004751-4vl0cvyq	69	29	to	to	TO
cord-004751-4vl0cvyq	69	30	35	35	CD
cord-004751-4vl0cvyq	69	31	days	day	NNS
cord-004751-4vl0cvyq	69	32	.	.	.
cord-004751-4vl0cvyq	70	1	This	this	DT
cord-004751-4vl0cvyq	70	2	virus	virus	NN
cord-004751-4vl0cvyq	70	3	behaved	behave	VBD
cord-004751-4vl0cvyq	70	4	similarly	similarly	RB
cord-004751-4vl0cvyq	70	5	to	to	IN
cord-004751-4vl0cvyq	70	6	the	the	DT
cord-004751-4vl0cvyq	70	7	A	A	NNP
cord-004751-4vl0cvyq	70	8	/	/	SYM
cord-004751-4vl0cvyq	70	9	PR	PR	NNP
cord-004751-4vl0cvyq	70	10	8	8	CD
cord-004751-4vl0cvyq	70	11	parent	parent	NN
cord-004751-4vl0cvyq	70	12	and	and	CC
cord-004751-4vl0cvyq	70	13	caused	cause	VBD
cord-004751-4vl0cvyq	70	14	very	very	RB
cord-004751-4vl0cvyq	70	15	little	little	JJ
cord-004751-4vl0cvyq	70	16	ciliary	ciliary	NN
cord-004751-4vl0cvyq	70	17	damage	damage	NN
cord-004751-4vl0cvyq	70	18	.	.	.
cord-004751-4vl0cvyq	71	1	However	however	RB
cord-004751-4vl0cvyq	71	2	,	,	,
cord-004751-4vl0cvyq	71	3	it	-PRON-	PRP
cord-004751-4vl0cvyq	71	4	grew	grow	VBD
cord-004751-4vl0cvyq	71	5	to	to	IN
cord-004751-4vl0cvyq	71	6	slightly	slightly	RB
cord-004751-4vl0cvyq	71	7	higher	high	JJR
cord-004751-4vl0cvyq	71	8	titres	titre	NNS
cord-004751-4vl0cvyq	71	9	in	in	IN
cord-004751-4vl0cvyq	71	10	the	the	DT
cord-004751-4vl0cvyq	71	11	ciliated	ciliated	JJ
cord-004751-4vl0cvyq	71	12	epithelium	epithelium	NN
cord-004751-4vl0cvyq	71	13	than	than	IN
cord-004751-4vl0cvyq	71	14	did	do	VBD
cord-004751-4vl0cvyq	71	15	the	the	DT
cord-004751-4vl0cvyq	71	16	parent	parent	NN
cord-004751-4vl0cvyq	71	17	.	.	.
cord-004751-4vl0cvyq	72	1	3.1.4	3.1.4	NNP
cord-004751-4vl0cvyq	72	2	.	.	.
cord-004751-4vl0cvyq	73	1	Clone	clone	NN
cord-004751-4vl0cvyq	73	2	6	6	CD
cord-004751-4vl0cvyq	73	3	(	(	-LRB-
cord-004751-4vl0cvyq	73	4	PLY8	PLY8	NNP
cord-004751-4vl0cvyq	73	5	x	x	SYM
cord-004751-4vl0cvyq	73	6	939	939	CD
cord-004751-4vl0cvyq	73	7	)	)	-RRB-
cord-004751-4vl0cvyq	74	1	This	this	DT
cord-004751-4vl0cvyq	74	2	recombinant	recombinant	NN
cord-004751-4vl0cvyq	74	3	was	be	VBD
cord-004751-4vl0cvyq	74	4	of	of	IN
cord-004751-4vl0cvyq	74	5	intermediate	intermediate	JJ
cord-004751-4vl0cvyq	74	6	pathogenicity	pathogenicity	NN
cord-004751-4vl0cvyq	74	7	for	for	IN
cord-004751-4vl0cvyq	74	8	cilia	cilia	NN
cord-004751-4vl0cvyq	74	9	,	,	,
cord-004751-4vl0cvyq	74	10	but	but	CC
cord-004751-4vl0cvyq	74	11	more	more	RBR
cord-004751-4vl0cvyq	74	12	closely	closely	RB
cord-004751-4vl0cvyq	74	13	resembled	resemble	VBN
cord-004751-4vl0cvyq	74	14	the	the	DT
cord-004751-4vl0cvyq	74	15	A	A	NNP
cord-004751-4vl0cvyq	74	16	/	/	SYM
cord-004751-4vl0cvyq	74	17	Eng	Eng	NNP
cord-004751-4vl0cvyq	74	18	.	.	NNP
cord-004751-4vl0cvyq	74	19	parent	parent	NN
cord-004751-4vl0cvyq	74	20	.	.	.
cord-004751-4vl0cvyq	75	1	In	in	IN
cord-004751-4vl0cvyq	75	2	other	other	JJ
cord-004751-4vl0cvyq	75	3	words	word	NNS
cord-004751-4vl0cvyq	75	4	some	some	DT
cord-004751-4vl0cvyq	75	5	rings	ring	NNS
cord-004751-4vl0cvyq	75	6	would	would	MD
cord-004751-4vl0cvyq	75	7	resist	resist	VB
cord-004751-4vl0cvyq	75	8	growth	growth	NN
cord-004751-4vl0cvyq	75	9	and	and	CC
cord-004751-4vl0cvyq	75	10	25	25	CD
cord-004751-4vl0cvyq	75	11	*	*	NFP
cord-004751-4vl0cvyq	75	12	destruction	destruction	NN
cord-004751-4vl0cvyq	75	13	for	for	IN
cord-004751-4vl0cvyq	75	14	a	a	DT
cord-004751-4vl0cvyq	75	15	few	few	JJ
cord-004751-4vl0cvyq	75	16	days	day	NNS
cord-004751-4vl0cvyq	75	17	longer	long	RBR
cord-004751-4vl0cvyq	75	18	than	than	IN
cord-004751-4vl0cvyq	75	19	average	average	JJ
cord-004751-4vl0cvyq	75	20	,	,	,
cord-004751-4vl0cvyq	75	21	but	but	CC
cord-004751-4vl0cvyq	75	22	widespread	widespread	JJ
cord-004751-4vl0cvyq	75	23	damage	damage	NN
cord-004751-4vl0cvyq	75	24	occurred	occur	VBD
cord-004751-4vl0cvyq	75	25	by	by	IN
cord-004751-4vl0cvyq	75	26	10	10	CD
cord-004751-4vl0cvyq	75	27	-	-	HYPH
cord-004751-4vl0cvyq	75	28	-12	-12	CD
cord-004751-4vl0cvyq	75	29	days	day	NNS
cord-004751-4vl0cvyq	75	30	,	,	,
cord-004751-4vl0cvyq	75	31	and	and	CC
cord-004751-4vl0cvyq	75	32	viral	viral	JJ
cord-004751-4vl0cvyq	75	33	growth	growth	NN
cord-004751-4vl0cvyq	75	34	was	be	VBD
cord-004751-4vl0cvyq	75	35	quite	quite	RB
cord-004751-4vl0cvyq	75	36	similar	similar	JJ
cord-004751-4vl0cvyq	75	37	to	to	IN
cord-004751-4vl0cvyq	75	38	the	the	DT
cord-004751-4vl0cvyq	75	39	A	A	NNP
cord-004751-4vl0cvyq	75	40	/	/	SYM
cord-004751-4vl0cvyq	75	41	Eng	Eng	NNP
cord-004751-4vl0cvyq	75	42	.	.	NNP
cord-004751-4vl0cvyq	75	43	parent	parent	NN
cord-004751-4vl0cvyq	75	44	as	as	IN
cord-004751-4vl0cvyq	75	45	shown	show	VBN
cord-004751-4vl0cvyq	75	46	in	in	IN
cord-004751-4vl0cvyq	75	47	Figure	figure	NN
cord-004751-4vl0cvyq	75	48	2	2	CD
cord-004751-4vl0cvyq	75	49	.	.	.
cord-004751-4vl0cvyq	76	1	Thus	thus	RB
cord-004751-4vl0cvyq	76	2	,	,	,
cord-004751-4vl0cvyq	76	3	both	both	DT
cord-004751-4vl0cvyq	76	4	by	by	IN
cord-004751-4vl0cvyq	76	5	observation	observation	NN
cord-004751-4vl0cvyq	76	6	of	of	IN
cord-004751-4vl0cvyq	76	7	ciliary	ciliary	NN
cord-004751-4vl0cvyq	76	8	activity	activity	NN
cord-004751-4vl0cvyq	76	9	and	and	CC
cord-004751-4vl0cvyq	76	10	by	by	IN
cord-004751-4vl0cvyq	76	11	titrating	titrate	VBG
cord-004751-4vl0cvyq	76	12	the	the	DT
cord-004751-4vl0cvyq	76	13	virus	virus	NN
cord-004751-4vl0cvyq	76	14	produced	produce	VBN
cord-004751-4vl0cvyq	76	15	,	,	,
cord-004751-4vl0cvyq	76	16	the	the	DT
cord-004751-4vl0cvyq	76	17	viruses	virus	NNS
cord-004751-4vl0cvyq	76	18	fall	fall	VBP
cord-004751-4vl0cvyq	76	19	into	into	IN
cord-004751-4vl0cvyq	76	20	the	the	DT
cord-004751-4vl0cvyq	76	21	order	order	NN
cord-004751-4vl0cvyq	76	22	PR8	PR8	NNP
cord-004751-4vl0cvyq	76	23	,	,	,
cord-004751-4vl0cvyq	76	24	64e	64e	CD
cord-004751-4vl0cvyq	76	25	,	,	,
cord-004751-4vl0cvyq	76	26	6	6	CD
cord-004751-4vl0cvyq	76	27	,	,	,
cord-004751-4vl0cvyq	76	28	A	A	NNP
cord-004751-4vl0cvyq	76	29	/	/	SYM
cord-004751-4vl0cvyq	76	30	Eng./939/69	Eng./939/69	NNP
cord-004751-4vl0cvyq	76	31	from	from	IN
cord-004751-4vl0cvyq	76	32	the	the	DT
cord-004751-4vl0cvyq	76	33	least	least	JJS
cord-004751-4vl0cvyq	76	34	to	to	IN
cord-004751-4vl0cvyq	76	35	the	the	DT
cord-004751-4vl0cvyq	76	36	most	most	RBS
cord-004751-4vl0cvyq	76	37	virulent	virulent	JJ
cord-004751-4vl0cvyq	76	38	for	for	IN
cord-004751-4vl0cvyq	76	39	cultured	cultured	JJ
cord-004751-4vl0cvyq	76	40	cells	cell	NNS
cord-004751-4vl0cvyq	76	41	.	.	.
cord-004751-4vl0cvyq	77	1	As	as	IN
cord-004751-4vl0cvyq	77	2	shown	show	VBN
cord-004751-4vl0cvyq	77	3	in	in	IN
cord-004751-4vl0cvyq	77	4	Table	Table	NNP
cord-004751-4vl0cvyq	77	5	1	1	CD
cord-004751-4vl0cvyq	77	6	,	,	,
cord-004751-4vl0cvyq	77	7	this	this	DT
cord-004751-4vl0cvyq	77	8	corresponds	correspond	VBZ
cord-004751-4vl0cvyq	77	9	exactly	exactly	RB
cord-004751-4vl0cvyq	77	10	to	to	IN
cord-004751-4vl0cvyq	77	11	the	the	DT
cord-004751-4vl0cvyq	77	12	order	order	NN
cord-004751-4vl0cvyq	77	13	of	of	IN
cord-004751-4vl0cvyq	77	14	virulence	virulence	NN
cord-004751-4vl0cvyq	77	15	found	find	VBN
cord-004751-4vl0cvyq	77	16	in	in	IN
cord-004751-4vl0cvyq	77	17	experiments	experiment	NNS
cord-004751-4vl0cvyq	77	18	in	in	IN
cord-004751-4vl0cvyq	77	19	human	human	JJ
cord-004751-4vl0cvyq	77	20	volunteers	volunteer	NNS
cord-004751-4vl0cvyq	77	21	and	and	CC
cord-004751-4vl0cvyq	77	22	recently	recently	RB
cord-004751-4vl0cvyq	77	23	reported	report	VBN
cord-004751-4vl0cvyq	77	24	by	by	IN
cord-004751-4vl0cvyq	77	25	BE	BE	NNP
cord-004751-4vl0cvyq	77	26	~	~	NFP
cord-004751-4vl0cvyq	77	27	mE	mE	NNP
cord-004751-4vl0cvyq	77	28	and	and	CC
cord-004751-4vl0cvyq	77	29	HALL	HALL	NNP
cord-004751-4vl0cvyq	77	30	(	(	-LRB-
cord-004751-4vl0cvyq	77	31	1971	1971	CD
cord-004751-4vl0cvyq	77	32	)	)	-RRB-
cord-004751-4vl0cvyq	77	33	.	.	.
cord-004751-4vl0cvyq	77	34	 	 	_SP
cord-004751-4vl0cvyq	78	1	As	as	IN
cord-004751-4vl0cvyq	78	2	shown	show	VBN
cord-004751-4vl0cvyq	78	3	in	in	IN
cord-004751-4vl0cvyq	78	4	Figure	Figure	NNP
cord-004751-4vl0cvyq	78	5	3	3	CD
cord-004751-4vl0cvyq	78	6	,	,	,
cord-004751-4vl0cvyq	78	7	it	-PRON-	PRP
cord-004751-4vl0cvyq	78	8	was	be	VBD
cord-004751-4vl0cvyq	78	9	not	not	RB
cord-004751-4vl0cvyq	78	10	possible	possible	JJ
cord-004751-4vl0cvyq	78	11	to	to	TO
cord-004751-4vl0cvyq	78	12	differentiate	differentiate	VB
cord-004751-4vl0cvyq	78	13	the	the	DT
cord-004751-4vl0cvyq	78	14	A	A	NNP
cord-004751-4vl0cvyq	78	15	/	/	SYM
cord-004751-4vl0cvyq	78	16	PR	PR	NNP
cord-004751-4vl0cvyq	78	17	8	8	CD
cord-004751-4vl0cvyq	78	18	parent	parent	NN
cord-004751-4vl0cvyq	78	19	from	from	IN
cord-004751-4vl0cvyq	78	20	the	the	DT
cord-004751-4vl0cvyq	78	21	other	other	JJ
cord-004751-4vl0cvyq	78	22	viruses	virus	NNS
cord-004751-4vl0cvyq	78	23	tested	test	VBN
cord-004751-4vl0cvyq	78	24	by	by	IN
cord-004751-4vl0cvyq	78	25	the	the	DT
cord-004751-4vl0cvyq	78	26	effect	effect	NN
cord-004751-4vl0cvyq	78	27	on	on	IN
cord-004751-4vl0cvyq	78	28	cilia	cilium	NNS
cord-004751-4vl0cvyq	78	29	.	.	.
cord-004751-4vl0cvyq	79	1	However	however	RB
cord-004751-4vl0cvyq	79	2	,	,	,
cord-004751-4vl0cvyq	79	3	this	this	DT
cord-004751-4vl0cvyq	79	4	virus	virus	NN
cord-004751-4vl0cvyq	79	5	grew	grow	VBD
cord-004751-4vl0cvyq	79	6	to	to	IN
cord-004751-4vl0cvyq	79	7	low	low	JJ
cord-004751-4vl0cvyq	79	8	titre	titre	NN
cord-004751-4vl0cvyq	79	9	as	as	IN
cord-004751-4vl0cvyq	79	10	it	-PRON-	PRP
cord-004751-4vl0cvyq	79	11	has	have	VBZ
cord-004751-4vl0cvyq	79	12	in	in	IN
cord-004751-4vl0cvyq	79	13	human	human	JJ
cord-004751-4vl0cvyq	79	14	tissue	tissue	NN
cord-004751-4vl0cvyq	79	15	(	(	-LRB-
cord-004751-4vl0cvyq	79	16	Table	table	NN
cord-004751-4vl0cvyq	79	17	1	1	CD
cord-004751-4vl0cvyq	79	18	)	)	-RRB-
cord-004751-4vl0cvyq	79	19	.	.	.
cord-004751-4vl0cvyq	80	1	Although	although	IN
cord-004751-4vl0cvyq	80	2	the	the	DT
cord-004751-4vl0cvyq	80	3	A	A	NNP
cord-004751-4vl0cvyq	80	4	/	/	SYM
cord-004751-4vl0cvyq	80	5	Eng	Eng	NNP
cord-004751-4vl0cvyq	80	6	.	.	NNP
cord-004751-4vl0cvyq	80	7	parent	parent	NN
cord-004751-4vl0cvyq	80	8	destroyed	destroy	VBD
cord-004751-4vl0cvyq	80	9	the	the	DT
cord-004751-4vl0cvyq	80	10	ciliated	ciliated	JJ
cord-004751-4vl0cvyq	80	11	epithelium	epithelium	NN
cord-004751-4vl0cvyq	80	12	of	of	IN
cord-004751-4vl0cvyq	80	13	human	human	JJ
cord-004751-4vl0cvyq	80	14	tissue	tissue	NN
cord-004751-4vl0cvyq	80	15	,	,	,
cord-004751-4vl0cvyq	80	16	it	-PRON-	PRP
cord-004751-4vl0cvyq	80	17	has	have	VBZ
cord-004751-4vl0cvyq	80	18	little	little	JJ
cord-004751-4vl0cvyq	80	19	effect	effect	NN
cord-004751-4vl0cvyq	80	20	on	on	IN
cord-004751-4vl0cvyq	80	21	ferret	ferret	JJ
cord-004751-4vl0cvyq	80	22	trachea	trachea	NN
cord-004751-4vl0cvyq	80	23	.	.	.
cord-004751-4vl0cvyq	81	1	In	in	IN
cord-004751-4vl0cvyq	81	2	one	one	CD
cord-004751-4vl0cvyq	81	3	experiment	experiment	NN
cord-004751-4vl0cvyq	81	4	in	in	IN
cord-004751-4vl0cvyq	81	5	which	which	WDT
cord-004751-4vl0cvyq	81	6	cultures	culture	NNS
cord-004751-4vl0cvyq	81	7	were	be	VBD
cord-004751-4vl0cvyq	81	8	held	hold	VBN
cord-004751-4vl0cvyq	81	9	for	for	IN
cord-004751-4vl0cvyq	81	10	a	a	DT
cord-004751-4vl0cvyq	81	11	long	long	JJ
cord-004751-4vl0cvyq	81	12	time	time	NN
cord-004751-4vl0cvyq	81	13	,	,	,
cord-004751-4vl0cvyq	81	14	the	the	DT
cord-004751-4vl0cvyq	81	15	eiliated	eiliated	JJ
cord-004751-4vl0cvyq	81	16	epithelium	epithelium	NN
cord-004751-4vl0cvyq	81	17	was	be	VBD
cord-004751-4vl0cvyq	81	18	destroyed	destroy	VBN
cord-004751-4vl0cvyq	81	19	after	after	IN
cord-004751-4vl0cvyq	81	20	about	about	RB
cord-004751-4vl0cvyq	81	21	three	three	CD
cord-004751-4vl0cvyq	81	22	weeks	week	NNS
cord-004751-4vl0cvyq	81	23	.	.	.
cord-004751-4vl0cvyq	82	1	Furthermore	furthermore	RB
cord-004751-4vl0cvyq	82	2	,	,	,
cord-004751-4vl0cvyq	82	3	the	the	DT
cord-004751-4vl0cvyq	82	4	A	A	NNP
cord-004751-4vl0cvyq	82	5	/	/	SYM
cord-004751-4vl0cvyq	82	6	Eng	Eng	NNP
cord-004751-4vl0cvyq	82	7	.	.	.
cord-004751-4vl0cvyq	83	1	virus	virus	NN
cord-004751-4vl0cvyq	83	2	multiplied	multiply	VBD
cord-004751-4vl0cvyq	83	3	to	to	IN
cord-004751-4vl0cvyq	83	4	high	high	JJ
cord-004751-4vl0cvyq	83	5	titre	titre	NN
cord-004751-4vl0cvyq	83	6	,	,	,
cord-004751-4vl0cvyq	83	7	range	range	NN
cord-004751-4vl0cvyq	83	8	from	from	IN
cord-004751-4vl0cvyq	83	9	108.16	108.16	CD
cord-004751-4vl0cvyq	83	10	to	to	IN
cord-004751-4vl0cvyq	83	11	106.2EID50	106.2eid50	CD
cord-004751-4vl0cvyq	83	12	/	/	SYM
cord-004751-4vl0cvyq	83	13	ml	ml	NN
cord-004751-4vl0cvyq	83	14	at	at	IN
cord-004751-4vl0cvyq	83	15	5	5	CD
cord-004751-4vl0cvyq	83	16	days	day	NNS
cord-004751-4vl0cvyq	83	17	.	.	.
cord-004751-4vl0cvyq	84	1	The	the	DT
cord-004751-4vl0cvyq	84	2	recombinant	recombinant	JJ
cord-004751-4vl0cvyq	84	3	viruses	virus	NNS
cord-004751-4vl0cvyq	84	4	did	do	VBD
cord-004751-4vl0cvyq	84	5	not	not	RB
cord-004751-4vl0cvyq	84	6	cause	cause	VB
cord-004751-4vl0cvyq	84	7	ciliary	ciliary	NN
cord-004751-4vl0cvyq	84	8	damage	damage	NN
cord-004751-4vl0cvyq	84	9	,	,	,
cord-004751-4vl0cvyq	84	10	but	but	CC
cord-004751-4vl0cvyq	84	11	at	at	IN
cord-004751-4vl0cvyq	84	12	5	5	CD
cord-004751-4vl0cvyq	84	13	days	day	NNS
cord-004751-4vl0cvyq	84	14	the	the	DT
cord-004751-4vl0cvyq	84	15	growth	growth	NN
cord-004751-4vl0cvyq	84	16	in	in	IN
cord-004751-4vl0cvyq	84	17	ferret	ferret	JJ
cord-004751-4vl0cvyq	84	18	epithelium	epithelium	NN
cord-004751-4vl0cvyq	84	19	was	be	VBD
cord-004751-4vl0cvyq	84	20	similar	similar	JJ
cord-004751-4vl0cvyq	84	21	to	to	IN
cord-004751-4vl0cvyq	84	22	that	that	DT
cord-004751-4vl0cvyq	84	23	in	in	IN
cord-004751-4vl0cvyq	84	24	human	human	JJ
cord-004751-4vl0cvyq	84	25	tissue	tissue	NN
cord-004751-4vl0cvyq	84	26	.	.	.
cord-004751-4vl0cvyq	85	1	In	in	IN
cord-004751-4vl0cvyq	85	2	other	other	JJ
cord-004751-4vl0cvyq	85	3	words	word	NNS
cord-004751-4vl0cvyq	85	4	,	,	,
cord-004751-4vl0cvyq	85	5	clone	clone	NN
cord-004751-4vl0cvyq	85	6	64c	64c	NNS
cord-004751-4vl0cvyq	85	7	attained	attain	VBD
cord-004751-4vl0cvyq	85	8	titres	titre	NNS
cord-004751-4vl0cvyq	85	9	(	(	-LRB-
cord-004751-4vl0cvyq	85	10	range	range	VBP
cord-004751-4vl0cvyq	85	11	at	at	IN
cord-004751-4vl0cvyq	85	12	5	5	CD
cord-004751-4vl0cvyq	85	13	days	day	NNS
cord-004751-4vl0cvyq	85	14	103.5	103.5	CD
cord-004751-4vl0cvyq	85	15	to	to	IN
cord-004751-4vl0cvyq	85	16	104.4EIDs0	104.4EIDs0	NNP
cord-004751-4vl0cvyq	85	17	/	/	SYM
cord-004751-4vl0cvyq	85	18	ml	ml	NN
cord-004751-4vl0cvyq	85	19	)	)	-RRB-
cord-004751-4vl0cvyq	85	20	similar	similar	JJ
cord-004751-4vl0cvyq	85	21	to	to	IN
cord-004751-4vl0cvyq	85	22	the	the	DT
cord-004751-4vl0cvyq	85	23	A	A	NNP
cord-004751-4vl0cvyq	85	24	/	/	SYM
cord-004751-4vl0cvyq	85	25	PR8	PR8	NNP
cord-004751-4vl0cvyq	85	26	parent	parent	NN
cord-004751-4vl0cvyq	85	27	,	,	,
cord-004751-4vl0cvyq	85	28	and	and	CC
cord-004751-4vl0cvyq	85	29	clone	clone	NN
cord-004751-4vl0cvyq	85	30	6	6	CD
cord-004751-4vl0cvyq	85	31	attained	attain	VBN
cord-004751-4vl0cvyq	85	32	titres	titre	NNS
cord-004751-4vl0cvyq	85	33	(	(	-LRB-
cord-004751-4vl0cvyq	85	34	range	range	VBP
cord-004751-4vl0cvyq	85	35	at	at	IN
cord-004751-4vl0cvyq	85	36	5	5	CD
cord-004751-4vl0cvyq	85	37	days	day	NNS
cord-004751-4vl0cvyq	85	38	104.5	104.5	CD
cord-004751-4vl0cvyq	85	39	to	to	IN
cord-004751-4vl0cvyq	85	40	105	105	CD
cord-004751-4vl0cvyq	85	41	-	-	SYM
cord-004751-4vl0cvyq	85	42	5EID50	5eid50	CD
cord-004751-4vl0cvyq	86	1	/ml	/ml	NFP
cord-004751-4vl0cvyq	86	2	)	)	-RRB-
cord-004751-4vl0cvyq	86	3	similar	similar	JJ
cord-004751-4vl0cvyq	86	4	to	to	IN
cord-004751-4vl0cvyq	86	5	the	the	DT
cord-004751-4vl0cvyq	86	6	A	A	NNP
cord-004751-4vl0cvyq	86	7	/	/	SYM
cord-004751-4vl0cvyq	86	8	Eng	Eng	NNP
cord-004751-4vl0cvyq	86	9	.	.	NNP
cord-004751-4vl0cvyq	86	10	parent	parent	NN
cord-004751-4vl0cvyq	86	11	.	.	.
cord-004751-4vl0cvyq	87	1	Since	since	IN
cord-004751-4vl0cvyq	87	2	the	the	DT
cord-004751-4vl0cvyq	87	3	differences	difference	NNS
cord-004751-4vl0cvyq	87	4	in	in	IN
cord-004751-4vl0cvyq	87	5	the	the	DT
cord-004751-4vl0cvyq	87	6	behaviour	behaviour	NN
cord-004751-4vl0cvyq	87	7	of	of	IN
cord-004751-4vl0cvyq	87	8	the	the	DT
cord-004751-4vl0cvyq	87	9	viruses	virus	NNS
cord-004751-4vl0cvyq	87	10	might	may	MD
cord-004751-4vl0cvyq	87	11	have	have	VB
cord-004751-4vl0cvyq	87	12	been	be	VBN
cord-004751-4vl0cvyq	87	13	related	relate	VBN
cord-004751-4vl0cvyq	87	14	to	to	IN
cord-004751-4vl0cvyq	87	15	the	the	DT
cord-004751-4vl0cvyq	87	16	fact	fact	NN
cord-004751-4vl0cvyq	87	17	that	that	IN
cord-004751-4vl0cvyq	87	18	they	-PRON-	PRP
cord-004751-4vl0cvyq	87	19	were	be	VBD
cord-004751-4vl0cvyq	87	20	prepared	prepare	VBN
cord-004751-4vl0cvyq	87	21	by	by	IN
cord-004751-4vl0cvyq	87	22	recombination	recombination	NN
cord-004751-4vl0cvyq	87	23	,	,	,
cord-004751-4vl0cvyq	87	24	rather	rather	RB
cord-004751-4vl0cvyq	87	25	than	than	IN
cord-004751-4vl0cvyq	87	26	to	to	IN
cord-004751-4vl0cvyq	87	27	the	the	DT
cord-004751-4vl0cvyq	87	28	attenua-	attenua-	NNS
cord-004751-4vl0cvyq	87	29	 	 	_SP
cord-004751-4vl0cvyq	88	1	Even	even	RB
cord-004751-4vl0cvyq	88	2	when	when	WRB
cord-004751-4vl0cvyq	88	3	optimally	optimally	RB
cord-004751-4vl0cvyq	88	4	constituted	constitute	VBD
cord-004751-4vl0cvyq	88	5	,	,	,
cord-004751-4vl0cvyq	88	6	the	the	DT
cord-004751-4vl0cvyq	88	7	usual	usual	JJ
cord-004751-4vl0cvyq	88	8	doses	dose	NNS
cord-004751-4vl0cvyq	88	9	of	of	IN
cord-004751-4vl0cvyq	88	10	inactivated	inactivate	VBN
cord-004751-4vl0cvyq	88	11	influenza	influenza	NN
cord-004751-4vl0cvyq	88	12	virus	virus	NN
cord-004751-4vl0cvyq	88	13	vaccines	vaccine	NNS
cord-004751-4vl0cvyq	88	14	are	be	VBP
cord-004751-4vl0cvyq	88	15	variably	variably	RB
cord-004751-4vl0cvyq	88	16	effective	effective	JJ
cord-004751-4vl0cvyq	88	17	in	in	IN
cord-004751-4vl0cvyq	88	18	preventing	prevent	VBG
cord-004751-4vl0cvyq	88	19	disease	disease	NN
cord-004751-4vl0cvyq	88	20	(	(	-LRB-
cord-004751-4vl0cvyq	88	21	SeHoENBAUM	SeHoENBAUM	NNP
cord-004751-4vl0cvyq	88	22	,	,	,
cord-004751-4vl0cvyq	88	23	MOSTOW	MOSTOW	NNP
cord-004751-4vl0cvyq	88	24	,	,	,
cord-004751-4vl0cvyq	88	25	DOWDL]~	DOWDL]~	NNP
cord-004751-4vl0cvyq	88	26	,	,	,
cord-004751-4vl0cvyq	88	27	CO	CO	NNP
cord-004751-4vl0cvyq	88	28	]	]	-RRB-
cord-004751-4vl0cvyq	88	29	~AN	~AN	NNP
cord-004751-4vl0cvyq	88	30	and	and	CC
cord-004751-4vl0cvyq	88	31	KAYE	KAYE	NNP
cord-004751-4vl0cvyq	88	32	,	,	,
cord-004751-4vl0cvyq	88	33	1969	1969	CD
cord-004751-4vl0cvyq	88	34	)	)	-RRB-
cord-004751-4vl0cvyq	88	35	.	.	.
cord-004751-4vl0cvyq	89	1	Live	live	JJ
cord-004751-4vl0cvyq	89	2	attenuated	attenuated	JJ
cord-004751-4vl0cvyq	89	3	vaccines	vaccine	NNS
cord-004751-4vl0cvyq	89	4	are	be	VBP
cord-004751-4vl0cvyq	89	5	a	a	DT
cord-004751-4vl0cvyq	89	6	possible	possible	JJ
cord-004751-4vl0cvyq	89	7	alternative	alternative	NN
cord-004751-4vl0cvyq	89	8	but	but	CC
cord-004751-4vl0cvyq	89	9	before	before	IN
cord-004751-4vl0cvyq	89	10	they	-PRON-	PRP
cord-004751-4vl0cvyq	89	11	can	can	MD
cord-004751-4vl0cvyq	89	12	be	be	VB
cord-004751-4vl0cvyq	89	13	introduced	introduce	VBN
cord-004751-4vl0cvyq	89	14	it	-PRON-	PRP
cord-004751-4vl0cvyq	89	15	is	be	VBZ
cord-004751-4vl0cvyq	89	16	necessary	necessary	JJ
cord-004751-4vl0cvyq	89	17	to	to	TO
cord-004751-4vl0cvyq	89	18	be	be	VB
cord-004751-4vl0cvyq	89	19	able	able	JJ
cord-004751-4vl0cvyq	89	20	to	to	TO
cord-004751-4vl0cvyq	89	21	obtain	obtain	VB
cord-004751-4vl0cvyq	89	22	rapidly	rapidly	RB
cord-004751-4vl0cvyq	89	23	and	and	CC
cord-004751-4vl0cvyq	89	24	reproducibly	reproducibly	RB
cord-004751-4vl0cvyq	89	25	from	from	IN
cord-004751-4vl0cvyq	89	26	wild	wild	JJ
cord-004751-4vl0cvyq	89	27	virus	virus	NN
cord-004751-4vl0cvyq	89	28	,	,	,
cord-004751-4vl0cvyq	89	29	strains	strain	NNS
cord-004751-4vl0cvyq	89	30	which	which	WDT
cord-004751-4vl0cvyq	89	31	grow	grow	VBP
cord-004751-4vl0cvyq	89	32	to	to	IN
cord-004751-4vl0cvyq	89	33	high	high	JJ
cord-004751-4vl0cvyq	89	34	titre	titre	NN
cord-004751-4vl0cvyq	89	35	in	in	IN
cord-004751-4vl0cvyq	89	36	eggs	egg	NNS
cord-004751-4vl0cvyq	89	37	and	and	CC
cord-004751-4vl0cvyq	89	38	which	which	WDT
cord-004751-4vl0cvyq	89	39	are	be	VBP
cord-004751-4vl0cvyq	89	40	a	a	DT
cord-004751-4vl0cvyq	89	41	attenuated	attenuated	JJ
cord-004751-4vl0cvyq	89	42	for	for	IN
cord-004751-4vl0cvyq	89	43	man	man	NN
cord-004751-4vl0cvyq	89	44	.	.	.
cord-004751-4vl0cvyq	90	1	It	-PRON-	PRP
cord-004751-4vl0cvyq	90	2	is	be	VBZ
cord-004751-4vl0cvyq	90	3	generally	generally	RB
cord-004751-4vl0cvyq	90	4	believed	believe	VBN
cord-004751-4vl0cvyq	90	5	that	that	IN
cord-004751-4vl0cvyq	90	6	virulence	virulence	NN
cord-004751-4vl0cvyq	90	7	is	be	VBZ
cord-004751-4vl0cvyq	90	8	determined	determine	VBN
cord-004751-4vl0cvyq	90	9	by	by	IN
cord-004751-4vl0cvyq	90	10	multiple	multiple	JJ
cord-004751-4vl0cvyq	90	11	genes	gene	NNS
cord-004751-4vl0cvyq	90	12	and	and	CC
cord-004751-4vl0cvyq	90	13	KILBOURNE	KILBOURNE	NNP
cord-004751-4vl0cvyq	90	14	(	(	-LRB-
cord-004751-4vl0cvyq	90	15	1969	1969	CD
cord-004751-4vl0cvyq	90	16	)	)	-RRB-
cord-004751-4vl0cvyq	90	17	suggested	suggest	VBD
cord-004751-4vl0cvyq	90	18	that	that	IN
cord-004751-4vl0cvyq	90	19	recombining	recombine	VBG
cord-004751-4vl0cvyq	90	20	a	a	DT
cord-004751-4vl0cvyq	90	21	virulent	virulent	JJ
cord-004751-4vl0cvyq	90	22	strain	strain	NN
cord-004751-4vl0cvyq	90	23	with	with	IN
cord-004751-4vl0cvyq	90	24	an	an	DT
cord-004751-4vl0cvyq	90	25	avirulent	avirulent	NN
cord-004751-4vl0cvyq	90	26	one	one	PRP
cord-004751-4vl0cvyq	90	27	would	would	MD
cord-004751-4vl0cvyq	90	28	give	give	VB
cord-004751-4vl0cvyq	90	29	progeny	progeny	NN
cord-004751-4vl0cvyq	90	30	with	with	IN
cord-004751-4vl0cvyq	90	31	intermediate	intermediate	JJ
cord-004751-4vl0cvyq	90	32	virulence	virulence	NN
cord-004751-4vl0cvyq	90	33	and	and	CC
cord-004751-4vl0cvyq	90	34	might	may	MD
cord-004751-4vl0cvyq	90	35	therefore	therefore	RB
cord-004751-4vl0cvyq	90	36	be	be	VB
cord-004751-4vl0cvyq	90	37	used	use	VBN
cord-004751-4vl0cvyq	90	38	as	as	IN
cord-004751-4vl0cvyq	90	39	a	a	DT
cord-004751-4vl0cvyq	90	40	means	means	NN
cord-004751-4vl0cvyq	90	41	of	of	IN
cord-004751-4vl0cvyq	90	42	simultaneous	simultaneous	JJ
cord-004751-4vl0cvyq	90	43	"	"	``
cord-004751-4vl0cvyq	90	44	instant	instant	JJ
cord-004751-4vl0cvyq	90	45	"	"	''
cord-004751-4vl0cvyq	90	46	attenuation	attenuation	NN
cord-004751-4vl0cvyq	90	47	and	and	CC
cord-004751-4vl0cvyq	90	48	adaptation	adaptation	NN
cord-004751-4vl0cvyq	90	49	to	to	IN
cord-004751-4vl0cvyq	90	50	eggs	egg	NNS
cord-004751-4vl0cvyq	90	51	.	.	.
cord-004751-4vl0cvyq	91	1	This	this	DT
cord-004751-4vl0cvyq	91	2	has	have	VBZ
cord-004751-4vl0cvyq	91	3	been	be	VBN
cord-004751-4vl0cvyq	91	4	shown	show	VBN
cord-004751-4vl0cvyq	91	5	to	to	TO
cord-004751-4vl0cvyq	91	6	be	be	VB
cord-004751-4vl0cvyq	91	7	possible	possible	JJ
cord-004751-4vl0cvyq	91	8	but	but	CC
cord-004751-4vl0cvyq	91	9	two	two	CD
cord-004751-4vl0cvyq	91	10	of	of	IN
cord-004751-4vl0cvyq	91	11	four	four	CD
cord-004751-4vl0cvyq	91	12	reeombinants	reeombinant	NNS
cord-004751-4vl0cvyq	91	13	were	be	VBD
cord-004751-4vl0cvyq	91	14	inadequately	inadequately	RB
cord-004751-4vl0cvyq	91	15	attenuated	attenuated	JJ
cord-004751-4vl0cvyq	91	16	(	(	-LRB-
cord-004751-4vl0cvyq	91	17	BEARE	BEARE	NNP
cord-004751-4vl0cvyq	91	18	and	and	CC
cord-004751-4vl0cvyq	91	19	HALL	HALL	NNP
cord-004751-4vl0cvyq	91	20	,	,	,
cord-004751-4vl0cvyq	91	21	1971	1971	CD
cord-004751-4vl0cvyq	91	22	)	)	-RRB-
cord-004751-4vl0cvyq	91	23	and	and	CC
cord-004751-4vl0cvyq	91	24	it	-PRON-	PRP
cord-004751-4vl0cvyq	91	25	would	would	MD
cord-004751-4vl0cvyq	91	26	therefore	therefore	RB
cord-004751-4vl0cvyq	91	27	be	be	VB
cord-004751-4vl0cvyq	91	28	useful	useful	JJ
cord-004751-4vl0cvyq	91	29	to	to	TO
cord-004751-4vl0cvyq	91	30	be	be	VB
cord-004751-4vl0cvyq	91	31	able	able	JJ
cord-004751-4vl0cvyq	91	32	to	to	TO
cord-004751-4vl0cvyq	91	33	distinguish	distinguish	VB
cord-004751-4vl0cvyq	91	34	attenuated	attenuated	JJ
cord-004751-4vl0cvyq	91	35	reeombinants	reeombinant	NNS
cord-004751-4vl0cvyq	91	36	in	in	IN
cord-004751-4vl0cvyq	91	37	the	the	DT
cord-004751-4vl0cvyq	91	38	laboratory	laboratory	NN
cord-004751-4vl0cvyq	91	39	.	.	.
cord-004751-4vl0cvyq	92	1	The	the	DT
cord-004751-4vl0cvyq	92	2	method	method	NN
cord-004751-4vl0cvyq	92	3	of	of	IN
cord-004751-4vl0cvyq	92	4	evaluation	evaluation	NN
cord-004751-4vl0cvyq	92	5	in	in	IN
cord-004751-4vl0cvyq	92	6	organ	organ	NN
cord-004751-4vl0cvyq	92	7	culture	culture	NN
cord-004751-4vl0cvyq	92	8	seems	seem	VBZ
cord-004751-4vl0cvyq	92	9	to	to	TO
cord-004751-4vl0cvyq	92	10	give	give	VB
cord-004751-4vl0cvyq	92	11	repeatable	repeatable	JJ
cord-004751-4vl0cvyq	92	12	and	and	CC
cord-004751-4vl0cvyq	92	13	consistent	consistent	JJ
cord-004751-4vl0cvyq	92	14	results	result	NNS
cord-004751-4vl0cvyq	92	15	as	as	IN
cord-004751-4vl0cvyq	92	16	was	be	VBD
cord-004751-4vl0cvyq	92	17	noticed	notice	VBN
cord-004751-4vl0cvyq	92	18	in	in	IN
cord-004751-4vl0cvyq	92	19	a	a	DT
cord-004751-4vl0cvyq	92	20	preliminary	preliminary	JJ
cord-004751-4vl0cvyq	92	21	paper	paper	NN
cord-004751-4vl0cvyq	92	22	(	(	-LRB-
cord-004751-4vl0cvyq	92	23	MosTow	MosTow	NNP
cord-004751-4vl0cvyq	92	24	and	and	CC
cord-004751-4vl0cvyq	92	25	TYRRWLL	TYRRWLL	NNP
cord-004751-4vl0cvyq	92	26	,	,	,
cord-004751-4vl0cvyq	92	27	1972	1972	CD
cord-004751-4vl0cvyq	92	28	)	)	-RRB-
cord-004751-4vl0cvyq	92	29	.	.	.
cord-004751-4vl0cvyq	93	1	This	this	DT
cord-004751-4vl0cvyq	93	2	paper	paper	NN
cord-004751-4vl0cvyq	93	3	reports	report	VBZ
cord-004751-4vl0cvyq	93	4	further	further	JJ
cord-004751-4vl0cvyq	93	5	results	result	NNS
cord-004751-4vl0cvyq	93	6	and	and	CC
cord-004751-4vl0cvyq	93	7	a	a	DT
cord-004751-4vl0cvyq	93	8	number	number	NN
cord-004751-4vl0cvyq	93	9	of	of	IN
cord-004751-4vl0cvyq	93	10	important	important	JJ
cord-004751-4vl0cvyq	93	11	points	point	NNS
cord-004751-4vl0cvyq	93	12	of	of	IN
cord-004751-4vl0cvyq	93	13	technique	technique	NN
cord-004751-4vl0cvyq	93	14	.	.	.
cord-004751-4vl0cvyq	94	1	There	there	EX
cord-004751-4vl0cvyq	94	2	appears	appear	VBZ
cord-004751-4vl0cvyq	94	3	also	also	RB
cord-004751-4vl0cvyq	94	4	to	to	TO
cord-004751-4vl0cvyq	94	5	be	be	VB
cord-004751-4vl0cvyq	94	6	some	some	DT
cord-004751-4vl0cvyq	94	7	variability	variability	NN
cord-004751-4vl0cvyq	94	8	in	in	IN
cord-004751-4vl0cvyq	94	9	the	the	DT
cord-004751-4vl0cvyq	94	10	susceptibility	susceptibility	NN
cord-004751-4vl0cvyq	94	11	of	of	IN
cord-004751-4vl0cvyq	94	12	different	different	JJ
cord-004751-4vl0cvyq	94	13	tracheas	trachea	NNS
cord-004751-4vl0cvyq	94	14	.	.	.
cord-004751-4vl0cvyq	95	1	The	the	DT
cord-004751-4vl0cvyq	95	2	data	datum	NNS
cord-004751-4vl0cvyq	95	3	were	be	VBD
cord-004751-4vl0cvyq	95	4	pooled	pool	VBN
cord-004751-4vl0cvyq	95	5	for	for	IN
cord-004751-4vl0cvyq	95	6	this	this	DT
cord-004751-4vl0cvyq	95	7	report	report	NN
cord-004751-4vl0cvyq	95	8	,	,	,
cord-004751-4vl0cvyq	95	9	but	but	CC
cord-004751-4vl0cvyq	95	10	nevertheless	nevertheless	RB
cord-004751-4vl0cvyq	95	11	each	each	DT
cord-004751-4vl0cvyq	95	12	individual	individual	JJ
cord-004751-4vl0cvyq	95	13	experiment	experiment	NN
cord-004751-4vl0cvyq	95	14	ranked	rank	VBD
cord-004751-4vl0cvyq	95	15	the	the	DT
cord-004751-4vl0cvyq	95	16	viruses	virus	NNS
cord-004751-4vl0cvyq	95	17	in	in	IN
cord-004751-4vl0cvyq	95	18	the	the	DT
cord-004751-4vl0cvyq	95	19	same	same	JJ
cord-004751-4vl0cvyq	95	20	order	order	NN
cord-004751-4vl0cvyq	95	21	;	;	:
cord-004751-4vl0cvyq	95	22	however	however	RB
cord-004751-4vl0cvyq	95	23	,	,	,
cord-004751-4vl0cvyq	95	24	we	-PRON-	PRP
cord-004751-4vl0cvyq	95	25	think	think	VBP
cord-004751-4vl0cvyq	95	26	it	-PRON-	PRP
cord-004751-4vl0cvyq	95	27	is	be	VBZ
cord-004751-4vl0cvyq	95	28	important	important	JJ
cord-004751-4vl0cvyq	95	29	to	to	TO
cord-004751-4vl0cvyq	95	30	include	include	VB
cord-004751-4vl0cvyq	95	31	the	the	DT
cord-004751-4vl0cvyq	95	32	virulent	virulent	JJ
cord-004751-4vl0cvyq	95	33	and	and	CC
cord-004751-4vl0cvyq	95	34	attenuated	attenuated	JJ
cord-004751-4vl0cvyq	95	35	parent	parent	NN
cord-004751-4vl0cvyq	95	36	in	in	IN
cord-004751-4vl0cvyq	95	37	each	each	DT
cord-004751-4vl0cvyq	95	38	test	test	NN
cord-004751-4vl0cvyq	95	39	as	as	IN
cord-004751-4vl0cvyq	95	40	controls	control	NNS
cord-004751-4vl0cvyq	95	41	.	.	.
cord-004751-4vl0cvyq	96	1	Using	use	VBG
cord-004751-4vl0cvyq	96	2	the	the	DT
cord-004751-4vl0cvyq	96	3	technique	technique	NN
cord-004751-4vl0cvyq	96	4	described	describe	VBN
cord-004751-4vl0cvyq	96	5	,	,	,
cord-004751-4vl0cvyq	96	6	there	there	EX
cord-004751-4vl0cvyq	96	7	was	be	VBD
cord-004751-4vl0cvyq	96	8	a	a	DT
cord-004751-4vl0cvyq	96	9	clear	clear	JJ
cord-004751-4vl0cvyq	96	10	correlation	correlation	NN
cord-004751-4vl0cvyq	96	11	between	between	IN
cord-004751-4vl0cvyq	96	12	free	free	JJ
cord-004751-4vl0cvyq	96	13	growth	growth	NN
cord-004751-4vl0cvyq	96	14	in	in	IN
cord-004751-4vl0cvyq	96	15	organ	organ	NN
cord-004751-4vl0cvyq	96	16	culture	culture	NN
cord-004751-4vl0cvyq	96	17	,	,	,
cord-004751-4vl0cvyq	96	18	damage	damage	NN
cord-004751-4vl0cvyq	96	19	to	to	IN
cord-004751-4vl0cvyq	96	20	cells	cell	NNS
cord-004751-4vl0cvyq	96	21	and	and	CC
cord-004751-4vl0cvyq	96	22	the	the	DT
cord-004751-4vl0cvyq	96	23	ability	ability	NN
cord-004751-4vl0cvyq	96	24	to	to	TO
cord-004751-4vl0cvyq	96	25	produce	produce	VB
cord-004751-4vl0cvyq	96	26	disease	disease	NN
cord-004751-4vl0cvyq	96	27	in	in	IN
cord-004751-4vl0cvyq	96	28	man	man	NN
cord-004751-4vl0cvyq	96	29	.	.	.
cord-004751-4vl0cvyq	97	1	We	-PRON-	PRP
cord-004751-4vl0cvyq	97	2	do	do	VBP
cord-004751-4vl0cvyq	97	3	not	not	RB
cord-004751-4vl0cvyq	97	4	know	know	VB
cord-004751-4vl0cvyq	97	5	whether	whether	IN
cord-004751-4vl0cvyq	97	6	this	this	DT
cord-004751-4vl0cvyq	97	7	correlation	correlation	NN
cord-004751-4vl0cvyq	97	8	would	would	MD
cord-004751-4vl0cvyq	97	9	hold	hold	VB
cord-004751-4vl0cvyq	97	10	with	with	IN
cord-004751-4vl0cvyq	97	11	tracheas	trachea	NNS
cord-004751-4vl0cvyq	97	12	from	from	IN
cord-004751-4vl0cvyq	97	13	other	other	JJ
cord-004751-4vl0cvyq	97	14	species	specie	NNS
cord-004751-4vl0cvyq	97	15	,	,	,
cord-004751-4vl0cvyq	97	16	if	if	IN
cord-004751-4vl0cvyq	97	17	not	not	RB
cord-004751-4vl0cvyq	97	18	,	,	,
cord-004751-4vl0cvyq	97	19	there	there	EX
cord-004751-4vl0cvyq	97	20	could	could	MD
cord-004751-4vl0cvyq	97	21	be	be	VB
cord-004751-4vl0cvyq	97	22	difficulty	difficulty	NN
cord-004751-4vl0cvyq	97	23	using	use	VBG
cord-004751-4vl0cvyq	97	24	the	the	DT
cord-004751-4vl0cvyq	97	25	test	test	NN
cord-004751-4vl0cvyq	97	26	because	because	IN
cord-004751-4vl0cvyq	97	27	of	of	IN
cord-004751-4vl0cvyq	97	28	lack	lack	NN
cord-004751-4vl0cvyq	97	29	of	of	IN
cord-004751-4vl0cvyq	97	30	an	an	DT
cord-004751-4vl0cvyq	97	31	adequate	adequate	JJ
cord-004751-4vl0cvyq	97	32	supply	supply	NN
cord-004751-4vl0cvyq	97	33	of	of	IN
cord-004751-4vl0cvyq	97	34	suitable	suitable	JJ
cord-004751-4vl0cvyq	97	35	human	human	JJ
cord-004751-4vl0cvyq	97	36	tracheal	tracheal	NN
cord-004751-4vl0cvyq	97	37	cultures	culture	NNS
cord-004751-4vl0cvyq	97	38	(	(	-LRB-
cord-004751-4vl0cvyq	97	39	SHAAFF	SHAAFF	NNP
cord-004751-4vl0cvyq	97	40	,	,	,
cord-004751-4vl0cvyq	97	41	BOSWELL	BOSWELL	NNP
cord-004751-4vl0cvyq	97	42	and	and	CC
cord-004751-4vl0cvyq	97	43	MUFSON	MUFSON	NNP
cord-004751-4vl0cvyq	97	44	,	,	,
cord-004751-4vl0cvyq	97	45	1971	1971	CD
cord-004751-4vl0cvyq	97	46	)	)	-RRB-
cord-004751-4vl0cvyq	97	47	.	.	.
cord-004751-4vl0cvyq	98	1	Our	-PRON-	PRP$
cord-004751-4vl0cvyq	98	2	results	result	NNS
cord-004751-4vl0cvyq	98	3	with	with	IN
cord-004751-4vl0cvyq	98	4	the	the	DT
cord-004751-4vl0cvyq	98	5	parental	parental	JJ
cord-004751-4vl0cvyq	98	6	strains	strain	NNS
cord-004751-4vl0cvyq	98	7	of	of	IN
cord-004751-4vl0cvyq	98	8	influenza	influenza	NN
cord-004751-4vl0cvyq	98	9	were	be	VBD
cord-004751-4vl0cvyq	98	10	not	not	RB
cord-004751-4vl0cvyq	98	11	particularly	particularly	RB
cord-004751-4vl0cvyq	98	12	surprising	surprising	JJ
cord-004751-4vl0cvyq	98	13	.	.	.
cord-004751-4vl0cvyq	99	1	The	the	DT
cord-004751-4vl0cvyq	99	2	basic	basic	JJ
cord-004751-4vl0cvyq	99	3	pathology	pathology	NN
cord-004751-4vl0cvyq	99	4	of	of	IN
cord-004751-4vl0cvyq	99	5	the	the	DT
cord-004751-4vl0cvyq	99	6	disease	disease	NN
cord-004751-4vl0cvyq	99	7	is	be	VBZ
cord-004751-4vl0cvyq	99	8	damage	damage	NN
cord-004751-4vl0cvyq	99	9	of	of	IN
cord-004751-4vl0cvyq	99	10	the	the	DT
cord-004751-4vl0cvyq	99	11	tracheal	tracheal	JJ
cord-004751-4vl0cvyq	99	12	cells	cell	NNS
cord-004751-4vl0cvyq	99	13	by	by	IN
cord-004751-4vl0cvyq	99	14	the	the	DT
cord-004751-4vl0cvyq	99	15	virus	virus	NN
cord-004751-4vl0cvyq	99	16	and	and	CC
cord-004751-4vl0cvyq	99	17	since	since	IN
cord-004751-4vl0cvyq	99	18	the	the	DT
cord-004751-4vl0cvyq	99	19	laboratory	laboratory	NN
cord-004751-4vl0cvyq	99	20	adapted	adapt	VBD
cord-004751-4vl0cvyq	99	21	strain	strain	NN
cord-004751-4vl0cvyq	99	22	,	,	,
cord-004751-4vl0cvyq	99	23	A	A	NNP
cord-004751-4vl0cvyq	99	24	/	/	SYM
cord-004751-4vl0cvyq	99	25	PR	PR	NNP
cord-004751-4vl0cvyq	99	26	8/34	8/34	NNP
cord-004751-4vl0cvyq	99	27	,	,	,
cord-004751-4vl0cvyq	99	28	does	do	VBZ
cord-004751-4vl0cvyq	99	29	not	not	RB
cord-004751-4vl0cvyq	99	30	cause	cause	VB
cord-004751-4vl0cvyq	99	31	disease	disease	NN
cord-004751-4vl0cvyq	99	32	in	in	IN
cord-004751-4vl0cvyq	99	33	humans	human	NNS
cord-004751-4vl0cvyq	99	34	,	,	,
cord-004751-4vl0cvyq	99	35	we	-PRON-	PRP
cord-004751-4vl0cvyq	99	36	did	do	VBD
cord-004751-4vl0cvyq	99	37	not	not	RB
cord-004751-4vl0cvyq	99	38	expect	expect	VB
cord-004751-4vl0cvyq	99	39	it	-PRON-	PRP
cord-004751-4vl0cvyq	99	40	to	to	TO
cord-004751-4vl0cvyq	99	41	damage	damage	VB
cord-004751-4vl0cvyq	99	42	the	the	DT
cord-004751-4vl0cvyq	99	43	eiliated	eiliate	VBN
cord-004751-4vl0cvyq	99	44	epithelium	epithelium	NN
cord-004751-4vl0cvyq	99	45	from	from	IN
cord-004751-4vl0cvyq	99	46	man	man	NN
cord-004751-4vl0cvyq	99	47	.	.	.
cord-004751-4vl0cvyq	100	1	Nevertheless	nevertheless	RB
cord-004751-4vl0cvyq	100	2	,	,	,
cord-004751-4vl0cvyq	100	3	the	the	DT
cord-004751-4vl0cvyq	100	4	cultures	culture	NNS
cord-004751-4vl0cvyq	100	5	were	be	VBD
cord-004751-4vl0cvyq	100	6	infected	infect	VBN
cord-004751-4vl0cvyq	100	7	whereas	whereas	IN
cord-004751-4vl0cvyq	100	8	the	the	DT
cord-004751-4vl0cvyq	100	9	volunteers	volunteer	NNS
cord-004751-4vl0cvyq	100	10	often	often	RB
cord-004751-4vl0cvyq	100	11	were	be	VBD
cord-004751-4vl0cvyq	100	12	not	not	RB
cord-004751-4vl0cvyq	100	13	.	.	.
cord-004751-4vl0cvyq	101	1	Conversely	conversely	RB
cord-004751-4vl0cvyq	101	2	,	,	,
cord-004751-4vl0cvyq	101	3	recently	recently	RB
cord-004751-4vl0cvyq	101	4	isolated	isolate	VBN
cord-004751-4vl0cvyq	101	5	influenza	influenza	NN
cord-004751-4vl0cvyq	101	6	A	a	DT
cord-004751-4vl0cvyq	101	7	strains	strain	NNS
cord-004751-4vl0cvyq	101	8	cause	cause	VBP
cord-004751-4vl0cvyq	101	9	clinical	clinical	JJ
cord-004751-4vl0cvyq	101	10	influenza	influenza	NN
cord-004751-4vl0cvyq	101	11	and	and	CC
cord-004751-4vl0cvyq	101	12	would	would	MD
cord-004751-4vl0cvyq	101	13	be	be	VB
cord-004751-4vl0cvyq	101	14	expected	expect	VBN
cord-004751-4vl0cvyq	101	15	to	to	TO
cord-004751-4vl0cvyq	101	16	destroy	destroy	VB
cord-004751-4vl0cvyq	101	17	eiliated	eiliated	NNP
cord-004751-4vl0cvyq	101	18	epitholium	epitholium	NNP
cord-004751-4vl0cvyq	101	19	.	.	.
cord-004751-4vl0cvyq	102	1	It	-PRON-	PRP
cord-004751-4vl0cvyq	102	2	has	have	VBZ
cord-004751-4vl0cvyq	102	3	been	be	VBN
cord-004751-4vl0cvyq	102	4	shown	show	VBN
cord-004751-4vl0cvyq	102	5	that	that	IN
cord-004751-4vl0cvyq	102	6	influenza	influenza	NN
cord-004751-4vl0cvyq	102	7	viruses	virus	NNS
cord-004751-4vl0cvyq	102	8	which	which	WDT
cord-004751-4vl0cvyq	102	9	have	have	VBP
cord-004751-4vl0cvyq	102	10	squired	squire	VBN
cord-004751-4vl0cvyq	102	11	ts	ts	NN
cord-004751-4vl0cvyq	102	12	markers	marker	NNS
cord-004751-4vl0cvyq	102	13	as	as	IN
cord-004751-4vl0cvyq	102	14	a	a	DT
cord-004751-4vl0cvyq	102	15	result	result	NN
cord-004751-4vl0cvyq	102	16	of	of	IN
cord-004751-4vl0cvyq	102	17	recombination	recombination	NN
cord-004751-4vl0cvyq	102	18	with	with	IN
cord-004751-4vl0cvyq	102	19	mutagen	mutagen	NN
cord-004751-4vl0cvyq	102	20	-	-	HYPH
cord-004751-4vl0cvyq	102	21	treated	treat	VBN
cord-004751-4vl0cvyq	102	22	strains	strain	NNS
cord-004751-4vl0cvyq	102	23	are	be	VBP
cord-004751-4vl0cvyq	102	24	attenuated	attenuate	VBN
cord-004751-4vl0cvyq	102	25	for	for	IN
cord-004751-4vl0cvyq	102	26	man	man	NN
cord-004751-4vl0cvyq	102	27	(	(	-LRB-
cord-004751-4vl0cvyq	102	28	C	c	NN
cord-004751-4vl0cvyq	102	29	~	~	NFP
cord-004751-4vl0cvyq	102	30	ANOCK	ANOCK	NNP
cord-004751-4vl0cvyq	102	31	,	,	,
cord-004751-4vl0cvyq	102	32	personal	personal	JJ
cord-004751-4vl0cvyq	102	33	communication	communication	NN
cord-004751-4vl0cvyq	102	34	)	)	-RRB-
cord-004751-4vl0cvyq	102	35	.	.	.
cord-004751-4vl0cvyq	103	1	It	-PRON-	PRP
cord-004751-4vl0cvyq	103	2	is	be	VBZ
cord-004751-4vl0cvyq	103	3	now	now	RB
cord-004751-4vl0cvyq	103	4	necessary	necessary	JJ
cord-004751-4vl0cvyq	103	5	to	to	TO
cord-004751-4vl0cvyq	103	6	determine	determine	VB
cord-004751-4vl0cvyq	103	7	whether	whether	IN
cord-004751-4vl0cvyq	103	8	these	these	DT
cord-004751-4vl0cvyq	103	9	strains	strain	NNS
cord-004751-4vl0cvyq	103	10	are	be	VBP
cord-004751-4vl0cvyq	103	11	a]so	a]so	IN
cord-004751-4vl0cvyq	103	12	avirulent	avirulent	NN
cord-004751-4vl0cvyq	103	13	in	in	IN
cord-004751-4vl0cvyq	103	14	our	-PRON-	PRP$
cord-004751-4vl0cvyq	103	15	tests	test	NNS
cord-004751-4vl0cvyq	103	16	.	.	.
cord-004751-4vl0cvyq	104	1	Likewise	likewise	RB
cord-004751-4vl0cvyq	104	2	recombinants	recombinant	NNS
cord-004751-4vl0cvyq	104	3	made	make	VBN
cord-004751-4vl0cvyq	104	4	with	with	IN
cord-004751-4vl0cvyq	104	5	other	other	JJ
cord-004751-4vl0cvyq	104	6	attenuated	attenuated	JJ
cord-004751-4vl0cvyq	104	7	strains	strain	NNS
cord-004751-4vl0cvyq	104	8	should	should	MD
cord-004751-4vl0cvyq	104	9	be	be	VB
cord-004751-4vl0cvyq	104	10	tested	test	VBN
cord-004751-4vl0cvyq	104	11	to	to	TO
cord-004751-4vl0cvyq	104	12	establish	establish	VB
cord-004751-4vl0cvyq	104	13	the	the	DT
cord-004751-4vl0cvyq	104	14	validity	validity	NN
cord-004751-4vl0cvyq	104	15	of	of	IN
cord-004751-4vl0cvyq	104	16	the	the	DT
cord-004751-4vl0cvyq	104	17	test	test	NN
cord-004751-4vl0cvyq	104	18	.	.	.
cord-004751-4vl0cvyq	105	1	If	if	IN
cord-004751-4vl0cvyq	105	2	it	-PRON-	PRP
cord-004751-4vl0cvyq	105	3	can	can	MD
cord-004751-4vl0cvyq	105	4	be	be	VB
cord-004751-4vl0cvyq	105	5	established	establish	VBN
cord-004751-4vl0cvyq	105	6	it	-PRON-	PRP
cord-004751-4vl0cvyq	105	7	would	would	MD
cord-004751-4vl0cvyq	105	8	suggest	suggest	VB
cord-004751-4vl0cvyq	105	9	that	that	IN
cord-004751-4vl0cvyq	105	10	the	the	DT
cord-004751-4vl0cvyq	105	11	only	only	JJ
cord-004751-4vl0cvyq	105	12	really	really	RB
cord-004751-4vl0cvyq	105	13	important	important	JJ
cord-004751-4vl0cvyq	105	14	factor	factor	NN
cord-004751-4vl0cvyq	105	15	in	in	IN
cord-004751-4vl0cvyq	105	16	virulence	virulence	NN
cord-004751-4vl0cvyq	105	17	for	for	IN
cord-004751-4vl0cvyq	105	18	man	man	NN
cord-004751-4vl0cvyq	105	19	is	be	VBZ
cord-004751-4vl0cvyq	105	20	whether	whether	IN
cord-004751-4vl0cvyq	105	21	the	the	DT
cord-004751-4vl0cvyq	105	22	virus	virus	NN
cord-004751-4vl0cvyq	105	23	multiplies	multiply	VBZ
cord-004751-4vl0cvyq	105	24	in	in	IN
cord-004751-4vl0cvyq	105	25	tracheal	tracheal	JJ
cord-004751-4vl0cvyq	105	26	cells	cell	NNS
cord-004751-4vl0cvyq	105	27	.	.	.
cord-004751-4vl0cvyq	106	1	Attenuation	attenuation	NN
cord-004751-4vl0cvyq	106	2	of	of	IN
cord-004751-4vl0cvyq	106	3	human	human	JJ
cord-004751-4vl0cvyq	106	4	influenza	influenza	NN
cord-004751-4vl0cvyq	106	5	A	a	DT
cord-004751-4vl0cvyq	106	6	viruses	virus	NNS
cord-004751-4vl0cvyq	107	1	Recombinant	recombinant	JJ
cord-004751-4vl0cvyq	108	1	influenza	influenza	NN
cord-004751-4vl0cvyq	108	2	A	a	DT
cord-004751-4vl0cvyq	108	3	viruses	virus	NNS
cord-004751-4vl0cvyq	108	4	as	as	IN
cord-004751-4vl0cvyq	108	5	live	live	JJ
cord-004751-4vl0cvyq	108	6	vaccines	vaccine	NNS
cord-004751-4vl0cvyq	108	7	for	for	IN
cord-004751-4vl0cvyq	108	8	man	man	NN
cord-004751-4vl0cvyq	108	9	Large	large	JJ
cord-004751-4vl0cvyq	108	10	quantity	quantity	NN
cord-004751-4vl0cvyq	108	11	production	production	NN
cord-004751-4vl0cvyq	108	12	of	of	IN
cord-004751-4vl0cvyq	108	13	chicken	chicken	NN
cord-004751-4vl0cvyq	108	14	embryo	embryo	NN
cord-004751-4vl0cvyq	108	15	trachea	trachea	NN
cord-004751-4vl0cvyq	108	16	organ	organ	NN
cord-004751-4vl0cvyq	108	17	cultures	culture	NNS
cord-004751-4vl0cvyq	108	18	for	for	IN
cord-004751-4vl0cvyq	108	19	use	use	NN
cord-004751-4vl0cvyq	108	20	of	of	IN
cord-004751-4vl0cvyq	108	21	virus	virus	NN
cord-004751-4vl0cvyq	108	22	and	and	CC
cord-004751-4vl0cvyq	108	23	mycoplasma	mycoplasma	NN
cord-004751-4vl0cvyq	108	24	studies	study	NNS
cord-004751-4vl0cvyq	108	25	Test	test	NN
cord-004751-4vl0cvyq	108	26	tube	tube	NN
cord-004751-4vl0cvyq	108	27	organ	organ	NN
cord-004751-4vl0cvyq	108	28	cultures	culture	NNS
cord-004751-4vl0cvyq	108	29	of	of	IN
cord-004751-4vl0cvyq	108	30	ciliated	ciliated	JJ
cord-004751-4vl0cvyq	108	31	epithelium	epithelium	NN
cord-004751-4vl0cvyq	108	32	for	for	IN
cord-004751-4vl0cvyq	108	33	the	the	DT
cord-004751-4vl0cvyq	108	34	isolation	isolation	NN
cord-004751-4vl0cvyq	108	35	of	of	IN
cord-004751-4vl0cvyq	108	36	respiratory	respiratory	JJ
cord-004751-4vl0cvyq	108	37	viruses	virus	NNS
cord-004751-4vl0cvyq	108	38	Future	future	JJ
cord-004751-4vl0cvyq	108	39	influenza	influenza	NN
cord-004751-4vl0cvyq	108	40	vaccines	vaccine	NNS
cord-004751-4vl0cvyq	108	41	and	and	CC
cord-004751-4vl0cvyq	108	42	the	the	DT
cord-004751-4vl0cvyq	108	43	use	use	NN
cord-004751-4vl0cvyq	108	44	of	of	IN
cord-004751-4vl0cvyq	108	45	genetic	genetic	JJ
cord-004751-4vl0cvyq	108	46	recombinants	recombinant	NNS
cord-004751-4vl0cvyq	109	1	The	the	DT
cord-004751-4vl0cvyq	109	2	growth	growth	NN
cord-004751-4vl0cvyq	109	3	and	and	CC
cord-004751-4vl0cvyq	109	4	maintenance	maintenance	NN
cord-004751-4vl0cvyq	109	5	of	of	IN
cord-004751-4vl0cvyq	109	6	tissue	tissue	NN
cord-004751-4vl0cvyq	109	7	-	-	HYPH
cord-004751-4vl0cvyq	109	8	cell	cell	NN
cord-004751-4vl0cvyq	109	9	cultures	culture	NNS
cord-004751-4vl0cvyq	109	10	in	in	IN
cord-004751-4vl0cvyq	109	11	free	free	JJ
cord-004751-4vl0cvyq	109	12	gas	gas	NN
cord-004751-4vl0cvyq	109	13	exchange	exchange	NN
cord-004751-4vl0cvyq	109	14	with	with	IN
cord-004751-4vl0cvyq	109	15	the	the	DT
cord-004751-4vl0cvyq	109	16	atmosphere	atmosphere	NN
cord-004751-4vl0cvyq	109	17	SCHILD	SCHILD	NNP
cord-004751-4vl0cvyq	109	18	:	:	:
cord-004751-4vl0cvyq	109	19	Segregation	segregation	NN
cord-004751-4vl0cvyq	109	20	of	of	IN
cord-004751-4vl0cvyq	109	21	antigenic	antigenic	JJ
cord-004751-4vl0cvyq	109	22	and	and	CC
cord-004751-4vl0cvyq	109	23	biological	biological	JJ
cord-004751-4vl0cvyq	109	24	characteristics	characteristic	NNS
cord-004751-4vl0cvyq	109	25	during	during	IN
cord-004751-4vl0cvyq	109	26	influenza	influenza	NN
cord-004751-4vl0cvyq	109	27	virus	virus	NN
cord-004751-4vl0cvyq	109	28	recombination	recombination	NN
cord-004751-4vl0cvyq	109	29	TYRRELL	TYRRELL	NNP
cord-004751-4vl0cvyq	109	30	:	:	:
cord-004751-4vl0cvyq	110	1	Detection	detection	NN
cord-004751-4vl0cvyq	110	2	of	of	IN
cord-004751-4vl0cvyq	110	3	attenuation	attenuation	NN
cord-004751-4vl0cvyq	110	4	of	of	IN
cord-004751-4vl0cvyq	110	5	recombinant	recombinant	JJ
cord-004751-4vl0cvyq	110	6	influenza	influenza	NN
cord-004751-4vl0cvyq	110	7	viruses	virus	NNS
cord-004751-4vl0cvyq	110	8	in	in	IN
cord-004751-4vl0cvyq	110	9	vitro	vitro	FW
cord-004751-4vl0cvyq	110	10	MUFSO	MUFSO	NNP
cord-004751-4vl0cvyq	111	1	~r	~r	NFP
cord-004751-4vl0cvyq	111	2	Viral	viral	JJ
cord-004751-4vl0cvyq	111	3	and	and	CC
cord-004751-4vl0cvyq	111	4	mycoplasmal	mycoplasmal	JJ
cord-004751-4vl0cvyq	111	5	infections	infection	NNS
cord-004751-4vl0cvyq	111	6	in	in	IN
cord-004751-4vl0cvyq	111	7	minor	minor	JJ
cord-004751-4vl0cvyq	111	8	respiratory	respiratory	JJ
cord-004751-4vl0cvyq	111	9	illnesses	illness	NNS
cord-004751-4vl0cvyq	111	10	and	and	CC
cord-004751-4vl0cvyq	111	11	non	non	JJ
cord-004751-4vl0cvyq	111	12	-	-	JJ
cord-004751-4vl0cvyq	111	13	streptococcal	streptococcal	JJ
cord-004751-4vl0cvyq	111	14	pharyngitis	pharyngitis	NN
cord-004751-4vl0cvyq	111	15	.	.	.
cord-004751-4vl0cvyq	112	1	A	a	DT
cord-004751-4vl0cvyq	112	2	search	search	NN
cord-004751-4vl0cvyq	112	3	for	for	IN
cord-004751-4vl0cvyq	112	4	coronaviruses	coronaviruse	NNS
cord-004751-4vl0cvyq	112	5	using	use	VBG
cord-004751-4vl0cvyq	112	6	foetal	foetal	JJ
cord-004751-4vl0cvyq	112	7	trachea	trachea	NN
cord-004751-4vl0cvyq	112	8	organ	organ	NN
cord-004751-4vl0cvyq	112	9	cultures	culture	NNS
cord-004751-4vl0cvyq	112	10	Studies	Studies	NNPS
cord-004751-4vl0cvyq	112	11	with	with	IN
cord-004751-4vl0cvyq	112	12	inactivated	inactivate	VBN
cord-004751-4vl0cvyq	112	13	influenza	influenza	NN
cord-004751-4vl0cvyq	112	14	vaccines	vaccine	NNS
cord-004751-4vl0cvyq	112	15	purified	purify	VBN
cord-004751-4vl0cvyq	112	16	by	by	IN
cord-004751-4vl0cvyq	112	17	zonal	zonal	JJ
cord-004751-4vl0cvyq	112	18	ultracentrifugation	ultracentrifugation	NN