If the US attacks Iran, it is probable that American forces - already taxed by attacks from Sunni factions - will also face reprisal attacks in Iraq from Shi'ite factions loyal to Iran.
1	If	if	SCONJ	IN	_	4	mark	4:mark	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	3:det	_
3	US	US	PROPN	NNP	Number=Sing	4	nsubj	4:nsubj	_
4	attacks	attack	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	advcl	9:advcl:if	_
5	Iran	Iran	PROPN	NNP	Number=Sing	4	obj	4:obj	SpaceAfter=No
6	,	,	PUNCT	,	_	9	punct	9:punct	_
7	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	9	nsubj	9:nsubj	_
8	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	cop	9:cop	_
9	probable	probable	ADJ	JJ	Degree=Pos	0	root	0:root	_
10	that	that	SCONJ	IN	_	24	mark	24:mark	_
11	American	American	ADJ	JJ	Degree=Pos	12	amod	12:amod	_
12	forces	force	NOUN	NNS	Number=Plur	24	nsubj	24:nsubj	_
13	-	-	PUNCT	,	_	15	punct	15:punct	_
14	already	already	ADV	RB	_	15	advmod	15:advmod	_
15	taxed	tax	VERB	VBN	Tense=Past|VerbForm=Part	12	acl	12:acl	_
16	by	by	ADP	IN	_	17	case	17:case	_
17	attacks	attack	NOUN	NNS	Number=Plur	15	obl	15:obl:by	_
18	from	from	ADP	IN	_	20	case	20:case	_
19	Sunni	Sunni	ADJ	JJ	Degree=Pos	20	amod	20:amod	_
20	factions	faction	NOUN	NNS	Number=Plur	17	nmod	17:nmod:from	_
21	-	-	PUNCT	,	_	15	punct	15:punct	_
22	will	will	AUX	MD	VerbForm=Fin	24	aux	24:aux	_
23	also	also	ADV	RB	_	24	advmod	24:advmod	_
24	face	face	VERB	VB	VerbForm=Inf	9	ccomp	9:ccomp	_
25	reprisal	reprisal	NOUN	NN	Number=Sing	26	compound	26:compound	_
26	attacks	attack	NOUN	NNS	Number=Plur	24	obj	24:obj	_
27	in	in	ADP	IN	_	28	case	28:case	_
28	Iraq	Iraq	PROPN	NNP	Number=Sing	24	obl	24:obl:in	_
29	from	from	ADP	IN	_	31	case	31:case	_
30	Shi'ite	shi'ite	ADJ	JJ	Degree=Pos	31	amod	31:amod	_
31	factions	faction	NOUN	NNS	Number=Plur	24	obl	24:obl:from	_
32	loyal	loyal	ADJ	JJ	Degree=Pos	31	amod	31:amod	_
33	to	to	ADP	IN	_	34	case	34:case	_
34	Iran	Iran	PROPN	NNP	Number=Sing	32	obl	32:obl:to	SpaceAfter=No
35	.	.	PUNCT	.	_	9	punct	9:punct	_
