In the 1960s, a group shooting a movie in the Wyoming park reportedly imported some captive wolves, then released them when their shooting was done.
1	In	in	ADP	IN	_	3	case	3:case	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	3:det	_
3	1960s	1960	NOUN	NNS	Number=Plur	15	obl	15:obl:in	SpaceAfter=No
4	,	,	PUNCT	,	_	15	punct	15:punct	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	6:det	_
6	group	group	NOUN	NN	Number=Sing	15	nsubj	15:nsubj|21:nsubj	_
7	shooting	shoot	VERB	VBG	VerbForm=Ger	6	acl	6:acl	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	9:det	_
9	movie	movie	NOUN	NN	Number=Sing	7	obj	7:obj	_
10	in	in	ADP	IN	_	13	case	13:case	_
11	the	the	DET	DT	Definite=Def|PronType=Art	13	det	13:det	_
12	Wyoming	Wyoming	PROPN	NNP	Number=Sing	13	compound	13:compound	_
13	park	park	NOUN	NN	Number=Sing	7	obl	7:obl:in	_
14	reportedly	reportedly	ADV	RB	_	15	advmod	15:advmod	_
15	imported	import	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	0:root	_
16	some	some	DET	DT	_	18	det	18:det	_
17	captive	captive	ADJ	JJ	Degree=Pos	18	amod	18:amod	_
18	wolves	wolf	NOUN	NNS	Number=Plur	15	obj	15:obj	SpaceAfter=No
19	,	,	PUNCT	,	_	21	punct	21:punct	_
20	then	then	ADV	RB	PronType=Dem	21	advmod	21:advmod	_
21	released	release	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	15	conj	15:conj	_
22	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	21	obj	21:obj	_
23	when	when	ADV	WRB	PronType=Int	27	advmod	27:advmod	_
24	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	25	nmod:poss	25:nmod:poss	_
25	shooting	shooting	NOUN	NN	Number=Sing	27	nsubj	27:nsubj	_
26	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	27	cop	27:cop	_
27	done	done	ADJ	JJ	Degree=Pos	21	advcl	21:advcl:when	SpaceAfter=No
28	.	.	PUNCT	.	_	15	punct	15:punct	_
