That's why I rang the buzzer without asking who it was.
1	That	that	PRON	DEM-SG	Number=Sing|PronType=Dem	5	nsubj	_	SpaceAfter=No
2	's	be	AUX	PRES	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
3	why	why	ADV	WH	PronType=Int	5	advmod	_	_
4	I	I	PRON	PERS-P1SG-NOM	Case=Nom|Number=Sing|Person=1|PronType=Prs	5	nsubj	_	_
5	rang	ring	VERB	PAST	Mood=Ind|Tense=Past|VerbForm=Fin	0	root	_	_
6	the	the	DET	DEF	Definite=Def|PronType=Art	7	det	_	_
7	buzzer	buzzer	NOUN	SG-NOM	Number=Sing	5	obj	_	_
8	without	without	ADP	_	_	9	mark	_	_
9	asking	ask	VERB	ING	Tense=Pres|VerbForm=Part	5	advcl	_	_
10	who	who	PRON	WH-NOM	PronType=Int	9	obj	_	_
11	it	it	PRON	PERS-SG	_	10	nsubj	_	_
12	was	be	AUX	PAST	Mood=Ind|Number=Sing|Person=1|Tense=Past|VerbForm=Fin	10	cop	_	SpaceAfter=No
13	.	.	PUNCT	Period	_	5	punct	_	_
