As he walked, Stillman did not look up.
1	As	as	SCONJ	_	_	3	mark	_	_
2	he	he	PRON	PERS-P3SG-NOM	Case=Nom|Gender=Masc|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
3	walked	walk	VERB	PAST	Mood=Ind|Tense=Past|VerbForm=Fin	8	advcl	_	SpaceAfter=No
4	,	,	PUNCT	Comma	_	3	punct	_	_
5	Stillman	Stillman	PROPN	SG-NOM	Number=Sing	8	nsubj	_	_
6	did	do	AUX	PAST-AUX	Mood=Ind|Tense=Past|VerbForm=Fin	8	aux	_	_
7	not	not	PART	NEG	_	8	advmod	_	_
8	look	look	VERB	INF	VerbForm=Inf	0	root	_	_
9	up	up	ADV	_	_	8	advmod	_	SpaceAfter=No
10	.	.	PUNCT	Period	_	8	punct	_	_
