Hence, I think that we have to reference the manufacturer.
1	Hence	hence	ADV	RB	_	4	advmod	4:advmod	SpaceAfter=No
2	,	,	PUNCT	,	_	4	punct	4:punct	_
3	I	I	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	4	nsubj	4:nsubj	_
4	think	think	VERB	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	0	root	0:root	_
5	that	that	SCONJ	IN	_	7	mark	7:mark	_
6	we	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	7	nsubj	7:nsubj|9:nsubj:xsubj	_
7	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=1|Tense=Pres|VerbForm=Fin	4	ccomp	4:ccomp	_
8	to	to	PART	TO	_	9	mark	9:mark	_
9	reference	reference	VERB	VB	VerbForm=Inf	7	xcomp	7:xcomp	_
10	the	the	DET	DT	Definite=Def|PronType=Art	11	det	11:det	_
11	manufacturer	manufacturer	NOUN	NN	Number=Sing	9	obj	9:obj	SpaceAfter=No
12	.	.	PUNCT	.	_	4	punct	4:punct	_
