Ozone is something that we understand the causes of, and the steps that need to be taken to improve air quality."
1	Ozone	ozone	NOUN	NN	Number=Sing	3	nsubj	3:nsubj	Discourse=elaboration-additional:50->49:0|Entity=(5-substance-giv:inact-cf2-1-coref)
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	cop	3:cop	_
3	something	something	NOUN	NN	Number=Sing	0	root	0:root	Entity=(5-substance-giv:act-cf2-1-pred
4	that	that	ADP	IN	_	8	nmod	8:nmod:of	Discourse=elaboration-attribute:51->50:0
5	we	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	6	nsubj	6:nsubj	Entity=(110-person-acc:com-cf4-1-sgl)
6	understand	understand	VERB	VBP	Mood=Ind|Number=Plur|Person=1|Tense=Pres|VerbForm=Fin	3	acl:relcl	3:acl:relcl	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	8:det	Entity=(111-abstract-new-cf6-3-sgl
8	causes	cause	NOUN	NNS	Number=Plur	6	obj	6:obj	_
9	of	of	ADP	IN	_	4	case	4:case	Entity=111)|SpaceAfter=No
10	,	,	PUNCT	,	_	13	punct	13:punct	_
11	and	and	CCONJ	CC	_	13	cc	13:cc	_
12	the	the	DET	DT	Definite=Def|PronType=Art	13	det	13:det	Entity=(112-abstract-new-cf5-2-sgl
13	steps	step	NOUN	NNS	Number=Plur	8	conj	6:obj|8:conj:and	_
14	that	that	PRON	WDT	PronType=Rel	18	nsubj:pass	18:nsubj:pass	Discourse=elaboration-attribute:52->51:0
15	need	need	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	13	acl:relcl	13:acl:relcl	_
16	to	to	PART	TO	_	18	mark	18:mark	_
17	be	be	AUX	VB	VerbForm=Inf	18	aux:pass	18:aux:pass	_
18	taken	take	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	15	xcomp	15:xcomp	_
19	to	to	PART	TO	_	20	mark	20:mark	Discourse=purpose-goal:53->52:0
20	improve	improve	VERB	VB	VerbForm=Inf	18	advcl	18:advcl:to	_
21	air	air	NOUN	NN	Number=Sing	22	compound	22:compound	Entity=(73-abstract-giv:act-cf1*-2-coref(71-substance-giv:inact-cf3-1-coref)
22	quality	quality	NOUN	NN	Number=Sing	20	obj	20:obj	Entity=73)112)5)|SpaceAfter=No
23	.	.	PUNCT	.	_	3	punct	3:punct	SpaceAfter=No
24	"	''	PUNCT	''	_	3	punct	3:punct	_
