One plus one is not necessarily two.
1	One	one	NUM	CARD-SG	NumType=Card	4	nsubj	_	_
2	plus	plus	CCONJ	_	_	3	cc	_	_
3	one	one	PRON	IND-P3SG	_	1	conj	_	_
4	is	be	AUX	PRES-AUX	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	not	not	PART	NEG	_	4	advmod	_	_
6	necessarily	necessarily	ADV	_	_	4	advmod	_	_
7	two	two	NUM	CARD-PL	NumType=Card	4	obj	_	SpaceAfter=No
8	.	.	PUNCT	Period	_	4	punct	_	_
