Who was it?
1	Who	who	PRON	WH-NOM	PronType=Int	0	root	_	_
2	was	be	AUX	PAST	Mood=Ind|Number=Sing|Person=1|Tense=Past|VerbForm=Fin	1	cop	_	_
3	it	it	PRON	PERS-SG	_	1	nsubj	_	SpaceAfter=No
4	?	?	PUNCT	QuestionMark	_	1	punct	_	_
