"Should the Arctic Ocean become ice-free in summer, it is likely that polar bears and some seal species would be driven toward extinction," the report concluded.
1	"	"	PUNCT	``	_	32	punct	32:punct	SpaceAfter=No
2	Should	should	AUX	MD	VerbForm=Fin	6	aux	6:aux	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	5:det	_
4	Arctic	Arctic	ADJ	NNP	Degree=Pos	5	amod	5:amod	_
5	Ocean	Ocean	PROPN	NNP	Number=Sing	6	nsubj	6:nsubj|9:nsubj:xsubj	_
6	become	become	VERB	VB	VerbForm=Inf	15	advcl	15:advcl	_
7	ice	ice	NOUN	NN	Number=Sing	9	compound	9:compound	SpaceAfter=No
8	-	-	PUNCT	HYPH	_	9	punct	9:punct	SpaceAfter=No
9	free	free	ADJ	JJ	Degree=Pos	6	xcomp	6:xcomp	_
10	in	in	ADP	IN	_	11	case	11:case	_
11	summer	summer	NOUN	NN	Number=Sing	9	obl	9:obl:in	SpaceAfter=No
12	,	,	PUNCT	,	_	15	punct	15:punct	_
13	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	15	nsubj	15:nsubj	_
14	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	15	cop	15:cop	_
15	likely	likely	ADJ	JJ	Degree=Pos	32	ccomp	32:ccomp	_
16	that	that	SCONJ	IN	_	25	mark	25:mark	_
17	polar	polar	ADJ	JJ	Degree=Pos	18	amod	18:amod	_
18	bears	bear	NOUN	NNS	Number=Plur	25	nsubj:pass	25:nsubj:pass	_
19	and	and	CCONJ	CC	_	22	cc	22:cc	_
20	some	some	DET	DT	_	22	det	22:det	_
21	seal	seal	NOUN	NN	Number=Sing	22	compound	22:compound	_
22	species	species	NOUN	NNS	Number=Plur	18	conj	18:conj:and|25:nsubj:pass	_
23	would	would	AUX	MD	VerbForm=Fin	25	aux	25:aux	_
24	be	be	AUX	VB	VerbForm=Inf	25	aux:pass	25:aux:pass	_
25	driven	drive	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	15	ccomp	15:ccomp	_
26	toward	toward	ADP	IN	_	27	case	27:case	_
27	extinction	extinction	NOUN	NN	Number=Sing	25	obl	25:obl:toward	SpaceAfter=No
28	,	,	PUNCT	,	_	32	punct	32:punct	SpaceAfter=No
29	"	"	PUNCT	''	_	32	punct	32:punct	_
30	the	the	DET	DT	Definite=Def|PronType=Art	31	det	31:det	_
31	report	report	NOUN	NN	Number=Sing	32	nsubj	32:nsubj	_
32	concluded	conclude	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	0:root	SpaceAfter=No
33	.	.	PUNCT	.	_	32	punct	32:punct	_
