It must be stamped out.
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	nsubj:pass	4:nsubj:pass	_
2	must	must	AUX	MD	VerbForm=Fin	4	aux	4:aux	_
3	be	be	AUX	VB	VerbForm=Inf	4	aux:pass	4:aux:pass	_
4	stamped	stamp	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	0:root	_
5	out	out	ADP	RP	_	4	compound:prt	4:compound:prt	SpaceAfter=No
6	.	.	PUNCT	.	_	4	punct	4:punct	_
