if they hiss, they are not playing.
1	if	if	SCONJ	IN	_	3	mark	3:mark	_
2	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	3	nsubj	3:nsubj	_
3	hiss	hiss	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	8	advcl	8:advcl:if	SpaceAfter=No
4	,	,	PUNCT	,	_	8	punct	8:punct	_
5	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	8	nsubj	8:nsubj	_
6	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	8	aux	8:aux	_
7	not	not	PART	RB	_	8	advmod	8:advmod	_
8	playing	play	VERB	VBG	Tense=Pres|VerbForm=Part	0	root	0:root	SpaceAfter=No
9	.	.	PUNCT	.	_	8	punct	8:punct	_
