Some merely refer to purely linguistic and formal aspects.
1	Some	some	PRON	IND	Case=Nom	3	nsubj	_	_
2	merely	mere	ADV	_	_	3	advmod	_	_
3	refer	refer	VERB	PRES	Mood=Ind|Tense=Pres|VerbForm=Fin	0	root	_	_
4	to	to	ADP	_	_	9	case	_	_
5	purely	purely	ADV	_	_	6	advmod	_	_
6	linguistic	linguistic	ADJ	POS	Degree=Pos	9	amod	_	_
7	and	and	CCONJ	_	_	8	cc	_	_
8	formal	formal	ADJ	POS	Degree=Pos	6	conj	_	_
9	aspects	aspect	NOUN	PL-NOM	Number=Plur	3	obl	_	SpaceAfter=No
10	.	.	PUNCT	Period	_	3	punct	_	_
