I don't know if this has been verified.
1	I	I	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	4	nsubj	4:nsubj	_
2-3	don't	_	_	_	_	_	_	_	_
2	do	do	AUX	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	4	aux	4:aux	_
3	n't	not	PART	RB	_	4	advmod	4:advmod	_
4	know	know	VERB	VB	VerbForm=Inf	0	root	0:root	_
5	if	if	SCONJ	IN	_	9	mark	9:mark	_
6	this	this	PRON	DT	Number=Sing|PronType=Dem	9	nsubj:pass	9:nsubj:pass	_
7	has	have	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	aux	9:aux	_
8	been	be	AUX	VBN	Tense=Past|VerbForm=Part	9	aux:pass	9:aux:pass	_
9	verified	verify	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	4	advcl	4:advcl:if	SpaceAfter=No
10	.	.	PUNCT	.	_	4	punct	4:punct	_
