Oh Hjalmar Wentz must have been.
1	Oh	oh	INTJ	_	_	6	discourse	_	_
2	Hjalmar	Hjalmar	PROPN	SG-NOM	Number=Sing	6	nsubj	_	_
3	Wentz	Wentz	PROPN	SG-NOM	Number=Sing	2	flat	_	_
4	must	must	AUX	PRES-AUX	VerbForm=Fin	6	aux	_	_
5	have	have	AUX	INF-AUX	Mood=Ind|Tense=Pres|VerbForm=Fin	6	aux	_	_
6	been	be	AUX	PERF	Tense=Past|VerbForm=Part	0	root	_	SpaceAfter=No
7	.	.	PUNCT	Period	_	6	punct	_	_
