There are several reasons for this.
1	There	there	PRON	EX	_	2	expl	_	_
2	are	be	VERB	PRES	Mood=Ind|Tense=Pres|VerbForm=Fin	0	root	_	_
3	several	several	ADJ	POS	Degree=Pos	4	amod	_	_
4	reasons	reason	NOUN	PL-NOM	Number=Plur	2	nsubj	_	_
5	for	for	ADP	_	_	6	case	_	_
6	this	this	PRON	DEM-SG	Number=Sing|PronType=Dem	4	nmod	_	SpaceAfter=No
7	.	.	PUNCT	Period	_	2	punct	_	_
