I know that I have the possibility of treating him and still having to put him down.
1	I	I	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	2	nsubj	2:nsubj	_
2	know	know	VERB	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	0	root	0:root	_
3	that	that	SCONJ	IN	_	5	mark	5:mark	_
4	I	I	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	5	nsubj	5:nsubj	_
5	have	have	VERB	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	2	ccomp	2:ccomp	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	7:det	_
7	possibility	possibility	NOUN	NN	Number=Sing	5	obj	5:obj	_
8	of	of	SCONJ	IN	_	9	mark	9:mark	_
9	treating	treat	VERB	VBG	VerbForm=Ger	7	acl	7:acl:of	_
10	him	he	PRON	PRP	Case=Acc|Gender=Masc|Number=Sing|Person=3|PronType=Prs	9	obj	9:obj	_
11	and	and	CCONJ	CC	_	13	cc	13:cc	_
12	still	still	ADV	RB	_	13	advmod	13:advmod	_
13	having	have	VERB	VBG	VerbForm=Ger	9	conj	7:acl:of|9:conj:and	_
14	to	to	PART	TO	_	15	mark	15:mark	_
15	put	put	VERB	VB	VerbForm=Inf	13	xcomp	13:xcomp	_
16	him	he	PRON	PRP	Case=Acc|Gender=Masc|Number=Sing|Person=3|PronType=Prs	15	obj	15:obj	_
17	down	down	ADP	RP	_	15	compound:prt	15:compound:prt	SpaceAfter=No
18	.	.	PUNCT	.	_	2	punct	2:punct	_
