Greendale likely refers to green river valley -- i.e., Cairo's Egyptian Islamic Jihad or the Islamic Group.
1	Greendale	Greendale	PROPN	NNP	Number=Sing	3	nsubj	3:nsubj	_
2	likely	likely	ADV	RB	_	3	advmod	3:advmod	_
3	refers	refer	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	0:root	_
4	to	to	ADP	IN	_	7	case	7:case	_
5	green	green	ADJ	JJ	Degree=Pos	7	amod	7:amod	_
6	river	river	NOUN	NN	Number=Sing	7	compound	7:compound	_
7	valley	valley	NOUN	NN	Number=Sing	3	obl	3:obl:to	_
8	--	--	PUNCT	:	_	7	punct	7:punct	_
9	i.e.	i.e.	ADJ	FW	_	15	amod	15:amod	SpaceAfter=No
10	,	,	PUNCT	,	_	15	punct	15:punct	_
11-12	Cairo's	_	_	_	_	_	_	_	_
11	Cairo	Cairo	PROPN	NNP	Number=Sing	15	nmod:poss	15:nmod:poss	_
12	's	's	PART	POS	_	11	case	11:case	_
13	Egyptian	Egyptian	ADJ	JJ	Degree=Pos	15	amod	15:amod	_
14	Islamic	Islamic	ADJ	NNP	Degree=Pos	15	amod	15:amod	_
15	Jihad	Jihad	PROPN	NNP	Number=Sing	7	appos	7:appos	_
16	or	or	CCONJ	CC	_	19	cc	19:cc	_
17	the	the	DET	DT	Definite=Def|PronType=Art	19	det	19:det	_
18	Islamic	Islamic	ADJ	NNP	Degree=Pos	19	amod	19:amod	_
19	Group	Group	PROPN	NNP	Number=Sing	15	conj	7:appos|15:conj:or	SpaceAfter=No
20	.	.	PUNCT	.	_	3	punct	3:punct	_
