The U.S. Environmental Protection Agency says some crops may have higher yields with increased levels of carbon dioxide.
1	The	the	DET	DT	Definite=Def|PronType=Art	5	det	5:det	Discourse=attribution-positive:42->43:0|Entity=(94-organization-new-cf3-2,3,4,5-sgl-United_States_Environmental_Protection_Agency
2	U.S.	U.S.	PROPN	NNP	Abbr=Yes|Number=Sing	5	compound	5:compound	Entity=(15-place-giv:inact-cf2-1-coref-United_States)|XML=<ref>
3	Environmental	Environmental	PROPN	NNP	Number=Sing	4	compound	4:compound	_
4	Protection	Protection	PROPN	NNP	Number=Sing	5	compound	5:compound	_
5	Agency	Agency	PROPN	NNP	Number=Sing	6	nsubj	6:nsubj	Entity=94)|XML=</ref>
6	says	say	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	0:root	_
7	some	some	DET	DT	PronType=Ind	8	det	8:det	Discourse=adversative-concession:43->44:0|Entity=(95-plant-new-cf4-2-sgl
8	crops	crop	NOUN	NNS	Number=Plur	10	nsubj	10:nsubj	Entity=95)
9	may	may	AUX	MD	Number=Plur|Person=3|VerbForm=Fin	10	aux	10:aux	_
10	have	have	VERB	VB	VerbForm=Inf	6	ccomp	6:ccomp	_
11	higher	high	ADJ	JJR	Degree=Cmp	12	amod	12:amod	Entity=(96-object-new-cf5-2-sgl
12	yields	yield	NOUN	NNS	Number=Plur	10	obj	10:obj	Entity=96)
13	with	with	ADP	IN	_	15	case	15:case	_
14	increased	increase	VERB	VBN	Tense=Past|VerbForm=Part	15	amod	15:amod	Entity=(91-abstract-giv:act-cf1*-2-coref
15	levels	level	NOUN	NNS	Number=Plur	10	obl	10:obl:with	_
16	of	of	ADP	IN	_	18	case	18:case	_
17	carbon	carbon	NOUN	NN	Number=Sing	18	compound	18:compound	Entity=(97-abstract-new-cf6-2-sgl|XML=<ref>
18	dioxide	dioxide	NOUN	NN	Number=Sing	15	nmod	15:nmod:of	Entity=97)91)|SpaceAfter=No|XML=</ref>
19	.	.	PUNCT	.	_	6	punct	6:punct	_
