The cousins could not be found because no one was sure of their married names.
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	2:det	_
2	cousins	cousin	NOUN	NNS	Number=Plur	6	nsubj:pass	6:nsubj:pass	_
3	could	could	AUX	MD	VerbForm=Fin	6	aux	6:aux	_
4	not	not	PART	RB	_	6	advmod	6:advmod	_
5	be	be	AUX	VB	VerbForm=Inf	6	aux:pass	6:aux:pass	_
6	found	find	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	0:root	_
7	because	because	SCONJ	IN	_	11	mark	11:mark	_
8	no	no	DET	DT	_	9	det	9:det	_
9	one	one	PRON	NN	Number=Sing|PronType=Neg	11	nsubj	11:nsubj	_
10	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	11	cop	11:cop	_
11	sure	sure	ADJ	JJ	Degree=Pos	6	advcl	6:advcl:because	_
12	of	of	ADP	IN	_	15	case	15:case	_
13	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	15	nmod:poss	15:nmod:poss	_
14	married	married	ADJ	JJ	Degree=Pos	15	amod	15:amod	_
15	names	name	NOUN	NNS	Number=Plur	11	obl	11:obl:of	SpaceAfter=No
16	.	.	PUNCT	.	_	6	punct	6:punct	_
