Although while in jail in the early 1980s, Zawahiri caused considerable tension by challenging the blind sheik's ability to lead a coalition of the Egyptian Islamic Jihad and the Egyptian Islamic Group, Zawahiri and OBL are Rahman's friends.
1	Although	although	SCONJ	IN	_	11	mark	11:mark	_
2	while	while	SCONJ	IN	_	4	mark	4:mark	_
3	in	in	ADP	IN	_	4	case	4:case	_
4	jail	jail	NOUN	NN	Number=Sing	11	advcl	11:advcl:in	_
5	in	in	ADP	IN	_	8	case	8:case	_
6	the	the	DET	DT	Definite=Def|PronType=Art	8	det	8:det	_
7	early	early	ADJ	JJ	Degree=Pos	8	amod	8:amod	_
8	1980s	1980	NOUN	NNS	Number=Plur	4	nmod	4:nmod:in	SpaceAfter=No
9	,	,	PUNCT	,	_	11	punct	11:punct	_
10	Zawahiri	Zawahiri	PROPN	NNP	Number=Sing	11	nsubj	11:nsubj	_
11	caused	cause	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	42	advcl	42:advcl:although	_
12	considerable	considerable	ADJ	JJ	Degree=Pos	13	amod	13:amod	_
13	tension	tension	NOUN	NN	Number=Sing	11	obj	11:obj	_
14	by	by	SCONJ	IN	_	15	mark	15:mark	_
15	challenging	challenge	VERB	VBG	VerbForm=Ger	11	advcl	11:advcl:by	_
16	the	the	DET	DT	Definite=Def|PronType=Art	18	det	18:det	_
17	blind	blind	ADJ	JJ	Degree=Pos	18	amod	18:amod	_
18-19	sheik's	_	_	_	_	_	_	_	_
18	sheik	sheik	NOUN	NN	Number=Sing	20	nmod:poss	20:nmod:poss	_
19	's	's	PART	POS	_	18	case	18:case	_
20	ability	ability	NOUN	NN	Number=Sing	15	obj	15:obj	_
21	to	to	PART	TO	_	22	mark	22:mark	_
22	lead	lead	VERB	VB	VerbForm=Inf	20	acl	20:acl:to	_
23	a	a	DET	DT	Definite=Ind|PronType=Art	24	det	24:det	_
24	coalition	coalition	NOUN	NN	Number=Sing	22	obj	22:obj	_
25	of	of	ADP	IN	_	29	case	29:case	_
26	the	the	DET	DT	Definite=Def|PronType=Art	29	det	29:det	_
27	Egyptian	Egyptian	ADJ	JJ	Degree=Pos	29	amod	29:amod	_
28	Islamic	Islamic	ADJ	NNP	Degree=Pos	29	amod	29:amod	_
29	Jihad	Jihad	PROPN	NNP	Number=Sing	22	obl	22:obl:of	_
30	and	and	CCONJ	CC	_	34	cc	34:cc	_
31	the	the	DET	DT	Definite=Def|PronType=Art	34	det	34:det	_
32	Egyptian	Egyptian	ADJ	JJ	Degree=Pos	34	amod	34:amod	_
33	Islamic	Islamic	ADJ	NNP	Degree=Pos	34	amod	34:amod	_
34	Group	Group	PROPN	NNP	Number=Sing	29	conj	22:obl:of|29:conj:and	SpaceAfter=No
35	,	,	PUNCT	,	_	42	punct	42:punct	_
36	Zawahiri	Zawahiri	PROPN	NNP	Number=Sing	42	nsubj	42:nsubj	_
37	and	and	CCONJ	CC	_	38	cc	38:cc	_
38	OBL	OBL	PROPN	NNP	Number=Sing	36	conj	36:conj:and|42:nsubj	_
39	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	42	cop	42:cop	_
40-41	Rahman's	_	_	_	_	_	_	_	_
40	Rahman	Rahman	PROPN	NNP	Number=Sing	42	nmod:poss	42:nmod:poss	_
41	's	's	PART	POS	_	40	case	40:case	_
42	friends	friend	NOUN	NNS	Number=Plur	0	root	0:root	SpaceAfter=No
43	.	.	PUNCT	.	_	42	punct	42:punct	_
