Stillman's behavior had been too obscure to give any hints.
1	Stillman	Stillman	PROPN	SG	Number=Sing	3	nmod:poss	_	SpaceAfter=No
2	's	's	PART	GEN	_	1	case	_	_
3	behavior	behavior	NOUN	SG-NOM	Number=Sing	7	nsubj	_	_
4	had	have	AUX	PAST	Mood=Ind|Tense=Past|VerbForm=Fin	7	aux	_	_
5	been	be	AUX	PERF	Tense=Past|VerbForm=Part	7	cop	_	_
6	too	too	ADV	_	_	7	advmod	_	_
7	obscure	obscure	ADJ	POS	Degree=Pos	0	root	_	_
8	to	to	PART	_	_	9	mark	_	_
9	give	give	VERB	INF	VerbForm=Inf	7	advcl	_	_
10	any	any	DET	IND	_	11	det	_	_
11	hints	hint	NOUN	PL-NOM	Number=Plur	9	obj	_	SpaceAfter=No
12	.	.	PUNCT	Period	_	7	punct	_	_
