A gas.
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	2:det	Discourse=restatement-repetition_m:77->75:1|Entity=(39-substance-giv:inact-cf1-2-coref
2	gas	gas	NOUN	NN	Number=Sing	0	root	0:root	Entity=39)|SpaceAfter=No
3	.	.	PUNCT	.	_	2	punct	2:punct	_
