The murder weapon, Robinson's letter opener:
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	3:det	_
2	murder	murder	NOUN	NN	Number=Sing	3	compound	3:compound	_
3	weapon	weapon	NOUN	NN	Number=Sing	0	root	0:root	SpaceAfter=No
4	,	,	PUNCT	,	_	3	punct	3:punct	_
5-6	Robinson's	_	_	_	_	_	_	_	_
5	Robinson	Robinson	PROPN	NNP	Number=Sing	8	nmod:poss	8:nmod:poss	_
6	's	's	PART	POS	_	5	case	5:case	_
7	letter	letter	NOUN	NN	Number=Sing	8	compound	8:compound	_
8	opener	opener	NOUN	NN	Number=Sing	3	appos	3:appos	SpaceAfter=No
9	:	:	PUNCT	:	_	3	punct	3:punct	_
