They argued self-righteously as two old-maid sisters.
1	They	they	PRON	PERS-PL-NOM	Case=Nom|Number=Plur|Person=3|PronType=Prs	2	nsubj	_	_
2	argued	argue	VERB	PAST	Mood=Ind|Tense=Past|VerbForm=Fin	0	root	_	_
3	self-righteously	self-righteous	ADV	_	_	2	advmod	_	_
4	as	as	ADP	_	_	7	case	_	_
5	two	two	NUM	CARD-PL	NumType=Card	7	nummod	_	_
6	old-maid	old-maid	NOUN	SG-NOM	Number=Sing	7	compound	_	_
7	sisters	sister	NOUN	PL-NOM	Number=Plur	2	obl	_	SpaceAfter=No
8	.	.	PUNCT	Period	_	2	punct	_	_
