If not, what is?
1	If	if	SCONJ	IN	_	2	mark	2:mark	_
2	not	not	PART	RB	_	5	advcl	5:advcl:if	SpaceAfter=No
3	,	,	PUNCT	,	_	5	punct	5:punct	_
4	what	what	PRON	WP	PronType=Int	5	nsubj	5:nsubj	_
5	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	0:root	Promoted=Yes|SpaceAfter=No
6	?	?	PUNCT	.	_	5	punct	5:punct	_
