I'm not sure how I would have handled it.
1-2	I'm	_	_	_	_	_	_	_	_
1	I	I	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	4	nsubj	4:nsubj	_
2	'm	be	AUX	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	4	cop	4:cop	_
3	not	not	PART	RB	_	4	advmod	4:advmod	_
4	sure	sure	ADJ	JJ	Degree=Pos	0	root	0:root	_
5	how	how	ADV	WRB	PronType=Int	9	advmod	9:advmod	_
6	I	I	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	9	nsubj	9:nsubj	_
7	would	would	AUX	MD	VerbForm=Fin	9	aux	9:aux	_
8	have	have	AUX	VB	VerbForm=Inf	9	aux	9:aux	_
9	handled	handle	VERB	VBN	Tense=Past|VerbForm=Part	4	ccomp	4:ccomp	_
10	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	9	obj	9:obj	SpaceAfter=No
11	.	.	PUNCT	.	_	4	punct	4:punct	_
