A May 2001 letter that Zawahiri sent to Egyptian Islamic Jihad members abroad establish that Zawahiri used "school" as a code word for the Egyptian militant islamists in his correspondence.
1	A	a	DET	DT	Definite=Ind|PronType=Art	4	det	4:det	_
2	May	May	PROPN	NNP	Number=Sing	4	compound	4:compound	_
3	2001	2001	NUM	CD	NumForm=Digit|NumType=Card	2	nummod	2:nummod	_
4	letter	letter	NOUN	NN	Number=Sing	14	nsubj	7:obj|14:nsubj	_
5	that	that	PRON	WDT	PronType=Rel	7	obj	4:ref	_
6	Zawahiri	Zawahiri	PROPN	NNP	Number=Sing	7	nsubj	7:nsubj	_
7	sent	send	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	4	acl:relcl	4:acl:relcl	_
8	to	to	ADP	IN	_	12	case	12:case	_
9	Egyptian	Egyptian	ADJ	JJ	Degree=Pos	12	amod	12:amod	_
10	Islamic	Islamic	ADJ	NNP	Degree=Pos	11	amod	11:amod	_
11	Jihad	Jihad	PROPN	NNP	Number=Sing	12	compound	12:compound	_
12	members	member	NOUN	NNS	Number=Plur	7	obl	7:obl:to	_
13	abroad	abroad	ADV	RB	_	12	advmod	12:advmod	_
14	establish	establish	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	0:root	_
15	that	that	SCONJ	IN	_	17	mark	17:mark	_
16	Zawahiri	Zawahiri	PROPN	NNP	Number=Sing	17	nsubj	17:nsubj	_
17	used	use	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	14	ccomp	14:ccomp	_
18	"	"	PUNCT	``	_	19	punct	19:punct	SpaceAfter=No
19	school	school	NOUN	NN	Number=Sing	17	obj	17:obj	SpaceAfter=No
20	"	"	PUNCT	''	_	19	punct	19:punct	_
21	as	as	ADP	IN	_	24	case	24:case	_
22	a	a	DET	DT	Definite=Ind|PronType=Art	24	det	24:det	_
23	code	code	NOUN	NN	Number=Sing	24	compound	24:compound	_
24	word	word	NOUN	NN	Number=Sing	17	obl	17:obl:as	_
25	for	for	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	militant	militant	ADJ	JJ	Degree=Pos	29	amod	29:amod	_
29	islamists	Islamist	NOUN	NNS	Number=Plur	24	nmod	24:nmod:for	_
30	in	in	ADP	IN	_	32	case	32:case	_
31	his	his	PRON	PRP$	Case=Gen|Gender=Masc|Number=Sing|Person=3|Poss=Yes|PronType=Prs	32	nmod:poss	32:nmod:poss	_
32	correspondence	correspondence	NOUN	NN	Number=Sing	17	obl	17:obl:in	SpaceAfter=No
33	.	.	PUNCT	.	_	14	punct	14:punct	_
