The true motives behind the duel are obscure.
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	3:det	Discourse=adversative-concession:39->57:4|Entity=(56-abstract-new-cf2-3-sgl
2	true	true	ADJ	JJ	Degree=Pos	3	amod	3:amod	_
3	motives	motive	NOUN	NNS	Number=Plur	8	nsubj	8:nsubj	_
4	behind	behind	ADP	IN	_	6	case	6:case	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	6:det	Entity=(51-event-giv:act-cf1*-2-coref
6	duel	duel	NOUN	NN	Number=Sing	3	nmod	3:nmod:behind	Entity=51)56)
7	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	8	cop	8:cop	_
8	obscure	obscure	ADJ	JJ	Degree=Pos	0	root	0:root	SpaceAfter=No
9	.	.	PUNCT	.	_	8	punct	8:punct	_
