I assume you need both gas and power.
1	I	I	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	2	nsubj	2:nsubj	_
2	assume	assume	VERB	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	0	root	0:root	_
3	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	4	nsubj	4:nsubj	_
4	need	need	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	2	ccomp	2:ccomp	_
5	both	both	CCONJ	CC	_	6	cc:preconj	6:cc:preconj	_
6	gas	gas	NOUN	NN	Number=Sing	4	obj	4:obj	_
7	and	and	CCONJ	CC	_	8	cc	8:cc	_
8	power	power	NOUN	NN	Number=Sing	6	conj	4:obj|6:conj:and	SpaceAfter=No
9	.	.	PUNCT	.	_	2	punct	2:punct	_
