There was lax control over the distribution of the Ames strain that was used, especially in light of the fact that transfers were not even required to be recorded prior to 1997.
1	There	there	PRON	EX	_	2	expl	2:expl	_
2	was	be	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	0:root	_
3	lax	lax	ADJ	JJ	Degree=Pos	4	amod	4:amod	_
4	control	control	NOUN	NN	Number=Sing	2	nsubj	2:nsubj	_
5	over	over	ADP	IN	_	7	case	7:case	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	7:det	_
7	distribution	distribution	NOUN	NN	Number=Sing	4	nmod	4:nmod:over	_
8	of	of	ADP	IN	_	11	case	11:case	_
9	the	the	DET	DT	Definite=Def|PronType=Art	11	det	11:det	_
10	Ames	Ames	PROPN	NNP	Number=Sing	11	compound	11:compound	_
11	strain	strain	NOUN	NN	Number=Sing	7	nmod	7:nmod:of|14:nsubj:pass	_
12	that	that	PRON	WDT	PronType=Rel	14	nsubj:pass	11:ref	_
13	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	14	aux:pass	14:aux:pass	_
14	used	use	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	11	acl:relcl	11:acl:relcl	SpaceAfter=No
15	,	,	PUNCT	,	_	2	punct	2:punct	_
16	especially	especially	ADV	RB	_	18	advmod	18:advmod	_
17	in	in	ADP	IN	_	18	case	18:case	_
18	light	light	NOUN	NN	Number=Sing	2	obl	2:obl:in	_
19	of	of	ADP	IN	_	21	case	21:case	_
20	the	the	DET	DT	Definite=Def|PronType=Art	21	det	21:det	_
21	fact	fact	NOUN	NN	Number=Sing	18	nmod	18:nmod:of	_
22	that	that	SCONJ	IN	_	27	mark	27:mark	_
23	transfers	transfer	NOUN	NNS	Number=Plur	27	nsubj:pass	27:nsubj:pass|30:nsubj:xsubj	_
24	were	be	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	27	aux:pass	27:aux:pass	_
25	not	not	PART	RB	_	27	advmod	27:advmod	_
26	even	even	ADV	RB	_	27	advmod	27:advmod	_
27	required	require	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	21	acl	21:acl:that	_
28	to	to	PART	TO	_	30	mark	30:mark	_
29	be	be	AUX	VB	VerbForm=Inf	30	aux:pass	30:aux:pass	_
30	recorded	record	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	27	xcomp	27:xcomp	_
31	prior	prior	ADJ	JJ	Degree=Pos|ExtPos=ADP	33	case	33:case	_
32	to	to	ADP	IN	_	31	fixed	31:fixed	_
33	1997	1997	NUM	CD	NumForm=Digit|NumType=Card	27	obl	27:obl:prior_to	SpaceAfter=No
34	.	.	PUNCT	.	_	2	punct	2:punct	_
