2) Your vet would not prescribe them if they didn't think it would be helpful.
1	2	2	NUM	LS	_	7	nummod	7:nummod	SpaceAfter=No
2	)	)	PUNCT	-RRB-	_	1	punct	1:punct	_
3	Your	your	PRON	PRP$	Case=Gen|Person=2|Poss=Yes|PronType=Prs	4	nmod:poss	4:nmod:poss	_
4	vet	vet	NOUN	NN	Number=Sing	7	nsubj	7:nsubj	_
5	would	would	AUX	MD	VerbForm=Fin	7	aux	7:aux	_
6	not	not	PART	RB	_	7	advmod	7:advmod	_
7	prescribe	prescribe	VERB	VB	VerbForm=Inf	0	root	0:root	_
8	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	7	obj	7:obj	_
9	if	if	SCONJ	IN	_	13	mark	13:mark	_
10	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	13	nsubj	13:nsubj	_
11-12	didn't	_	_	_	_	_	_	_	_
11	did	do	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	13	aux	13:aux	_
12	n't	not	PART	RB	_	13	advmod	13:advmod	_
13	think	think	VERB	VB	VerbForm=Inf	7	advcl	7:advcl:if	_
14	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	17	nsubj	17:nsubj	_
15	would	would	AUX	MD	VerbForm=Fin	17	aux	17:aux	_
16	be	be	AUX	VB	VerbForm=Inf	17	cop	17:cop	_
17	helpful	helpful	ADJ	JJ	Degree=Pos	13	ccomp	13:ccomp	SpaceAfter=No
18	.	.	PUNCT	.	_	7	punct	7:punct	_
