it's very logical.
1-2	it's	_	_	_	_	_	_	_	_
1	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	nsubj	4:nsubj	_
2	's	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	4:cop	_
3	very	very	ADV	RB	_	4	advmod	4:advmod	_
4	logical	logical	ADJ	JJ	Degree=Pos	0	root	0:root	SpaceAfter=No
5	.	.	PUNCT	.	_	4	punct	4:punct	_
