Yes they do.
1	Yes	yes	INTJ	UH	_	3	discourse	3:discourse	_
2	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	3	nsubj	3:nsubj	_
3	do	do	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	0:root	SpaceAfter=No
4	.	.	PUNCT	.	_	3	punct	3:punct	_
