What, then, could he conclude?
1	What	what	PRON	WH	PronType=Int	7	obj	_	SpaceAfter=No
2	,	,	PUNCT	Comma	_	1	punct	_	_
3	then	then	ADV	_	PronType=Dem	7	advmod	_	SpaceAfter=No
4	,	,	PUNCT	Comma	_	3	punct	_	_
5	could	could	AUX	PAST-AUX	VerbForm=Fin	7	aux	_	_
6	he	he	PRON	PERS-P3SG-NOM	Case=Nom|Gender=Masc|Number=Sing|Person=3|PronType=Prs	7	nsubj	_	_
7	conclude	conclude	VERB	INF	VerbForm=Inf	0	root	_	SpaceAfter=No
8	?	?	PUNCT	QuestionMark	_	7	punct	_	_
