They were very friendly and were able to explain me exactly what was wrong with it.
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	4	nsubj	4:nsubj|7:nsubj	_
2	were	be	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	4	cop	4:cop	_
3	very	very	ADV	RB	_	4	advmod	4:advmod	_
4	friendly	friendly	ADJ	JJ	Degree=Pos	0	root	0:root	_
5	and	and	CCONJ	CC	_	7	cc	7:cc	_
6	were	be	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	7	cop	7:cop	_
7	able	able	ADJ	JJ	Degree=Pos	4	conj	4:conj:and	_
8	to	to	PART	TO	_	9	mark	9:mark	_
9	explain	explain	VERB	VB	VerbForm=Inf	7	advcl	7:advcl:to	_
10	me	I	PRON	PRP	Case=Acc|Number=Sing|Person=1|PronType=Prs	9	iobj	9:iobj	_
11	exactly	exactly	ADV	RB	_	12	advmod	12:advmod	_
12	what	what	PRON	WP	PronType=Int	14	nsubj	14:nsubj	_
13	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	14	cop	14:cop	_
14	wrong	wrong	ADJ	JJ	Degree=Pos	9	ccomp	9:ccomp	_
15	with	with	ADP	IN	_	16	case	16:case	_
16	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	14	obl	14:obl:with	SpaceAfter=No
17	.	.	PUNCT	.	_	4	punct	4:punct	_
