"I don't know how these events could have taken place without some concerted effort," said Dunn.
1	"	"	PUNCT	``	_	19	punct	19:punct	SpaceAfter=No
2	I	I	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	5	nsubj	5:nsubj	_
3-4	don't	_	_	_	_	_	_	_	_
3	do	do	AUX	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	5	aux	5:aux	_
4	n't	not	PART	RB	_	5	advmod	5:advmod	_
5	know	know	VERB	VB	VerbForm=Inf	19	ccomp	19:ccomp	_
6	how	how	ADV	WRB	PronType=Int	11	advmod	11:advmod	_
7	these	this	DET	DT	Number=Plur|PronType=Dem	8	det	8:det	_
8	events	event	NOUN	NNS	Number=Plur	11	nsubj	11:nsubj	_
9	could	could	AUX	MD	VerbForm=Fin	11	aux	11:aux	_
10	have	have	AUX	VB	VerbForm=Inf	11	aux	11:aux	_
11	taken	take	VERB	VBN	Tense=Past|VerbForm=Part	5	ccomp	5:ccomp	_
12	place	place	NOUN	NN	Number=Sing	11	obj	11:obj	_
13	without	without	ADP	IN	_	16	case	16:case	_
14	some	some	DET	DT	_	16	det	16:det	_
15	concerted	concerted	ADJ	JJ	Degree=Pos	16	amod	16:amod	_
16	effort	effort	NOUN	NN	Number=Sing	11	obl	11:obl:without	SpaceAfter=No
17	,	,	PUNCT	,	_	19	punct	19:punct	SpaceAfter=No
18	"	"	PUNCT	''	_	19	punct	19:punct	_
19	said	say	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	0:root	_
20	Dunn	Dunn	PROPN	NNP	Number=Sing	19	nsubj	19:nsubj	SpaceAfter=No
21	.	.	PUNCT	.	_	19	punct	19:punct	_
