There has been much speculation as to the reasons behind it.
1	There	there	PRON	EX	PronType=Dem	5	expl	5:expl	Discourse=joint-list_m:40->39:0
2	has	have	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	aux	5:aux	_
3	been	be	AUX	VBN	Tense=Past|VerbForm=Part	5	cop	5:cop	_
4	much	much	ADJ	JJ	Degree=Pos	5	amod	5:amod	Entity=(57-abstract-new-cf3-2-sgl
5	speculation	speculation	NOUN	NN	Number=Sing	0	root	0:root	_
6	as	as	ADP	IN	_	9	case	9:case	_
7	to	to	ADP	IN	_	6	fixed	6:fixed	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	9:det	Entity=(58-abstract-new-cf2-2-coref
9	reasons	reason	NOUN	NNS	Number=Plur	5	nmod	5:nmod:as_to	_
10	behind	behind	ADP	IN	_	11	case	11:case	_
11	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	9	nmod	9:nmod:behind	Entity=(51-event-giv:act-cf1*-1-ana)58)57)|SpaceAfter=No
12	.	.	PUNCT	.	_	5	punct	5:punct	_
