We are obliged to do so because we are the representatives of the citizens in a Europe of Citizens and not just in a Europe of States and of Regions.
1	We	we	PRON	PE	Number=Plur|Person=1|PronType=Prs	3	nsubj:pass	_	_
2	are	be	AUX	VA	Mood=Ind|Number=Plur|Tense=Pres|VerbForm=Fin	3	aux:pass	_	_
3	obliged	oblige	VERB	V	Tense=Past|VerbForm=Part	0	root	_	_
4	to	to	PART	PART	_	5	mark	_	_
5	do	do	VERB	V	VerbForm=Inf	3	xcomp	_	_
6	so	so	ADV	B	_	5	advmod	_	_
7	because	because	SCONJ	CS	_	11	mark	_	_
8	we	we	PRON	PE	Number=Plur|Person=1|PronType=Prs	11	nsubj	_	_
9	are	be	AUX	V	Mood=Ind|Number=Plur|Tense=Pres|VerbForm=Fin	11	cop	_	_
10	the	the	DET	RD	Definite=Def|PronType=Art	11	det	_	_
11	representatives	representative	NOUN	S	Number=Plur	5	advcl	_	_
12	of	of	ADP	E	_	14	case	_	_
13	the	the	DET	RD	Definite=Def|PronType=Art	14	det	_	_
14	citizens	citizen	NOUN	S	Number=Plur	11	nmod	_	_
15	in	in	ADP	E	_	17	case	_	_
16	a	a	DET	RI	Definite=Ind|Number=Sing|PronType=Art	17	det	_	_
17	Europe	Europe	PROPN	SP	_	11	nmod	_	_
18	of	of	ADP	E	_	19	case	_	_
19	Citizens	citizen	NOUN	S	Number=Plur	17	nmod	_	_
20	and	and	CCONJ	CC	_	25	cc	_	_
21	not	not	PART	PART	Polarity=Neg	22	advmod	_	_
22	just	just	ADV	B	_	25	advmod	_	_
23	in	in	ADP	E	_	25	case	_	_
24	a	a	DET	RI	Definite=Ind|Number=Sing|PronType=Art	25	det	_	_
25	Europe	Europe	PROPN	SP	_	17	conj	_	_
26	of	of	ADP	E	_	27	case	_	_
27	States	state	NOUN	S	Number=Plur	25	nmod	_	_
28	and	and	CCONJ	CC	_	30	cc	_	_
29	of	of	ADP	E	_	30	case	_	_
30	Regions	region	NOUN	S	Number=Plur	27	conj	_	SpaceAfter=No
31	.	.	PUNCT	FS	_	3	punct	_	_
