He was 20 years old.
1	He	he	PRON	PRP	Case=Nom|Gender=Masc|Number=Sing|Person=3|PronType=Prs	5	nsubj	5:nsubj	Discourse=context-background:144->146:3|Entity=(4-person-giv:act-cf1*-1-ana-Évariste_Galois)
2	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	5	cop	5:cop	_
3	20	20	NUM	CD	NumForm=Digit|NumType=Card	4	nummod	4:nummod	Entity=(178-time-new-cf2-2-coref
4	years	year	NOUN	NNS	Number=Plur	5	obl:tmod	5:obl:tmod	Entity=178)
5	old	old	ADJ	JJ	Degree=Pos	0	root	0:root	SpaceAfter=No
6	.	.	PUNCT	.	_	5	punct	5:punct	_
