Not once did he try to contact his son.
1	Not	not	PART	NEG	_	2	advmod	_	_
2	once	once	ADV	_	NumType=Mult	5	advmod	_	_
3	did	do	AUX	PAST-AUX	Mood=Ind|Tense=Past|VerbForm=Fin	5	aux	_	_
4	he	he	PRON	PERS-P3SG-NOM	Case=Nom|Gender=Masc|Number=Sing|Person=3|PronType=Prs	5	nsubj	_	_
5	try	try	VERB	INF	VerbForm=Inf	0	root	_	_
6	to	to	PART	_	_	7	mark	_	_
7	contact	contact	VERB	INF	VerbForm=Inf	5	xcomp	_	_
8	his	he	PRON	P3SG-GEN	Gender=Masc|Number=Sing|Person=3|Poss=Yes|PronType=Prs	9	nmod:poss	_	_
9	son	son	NOUN	SG-NOM	Number=Sing	7	obj	_	SpaceAfter=No
10	.	.	PUNCT	Period	_	5	punct	_	_
