This formidable enemy, which gave the Indian army a black eye in the mid-1980s, has been operating in northeastern India and in the Andaman Sea for a long time.
1	This	this	DET	DT	Number=Sing|PronType=Dem	3	det	3:det	_
2	formidable	formidable	ADJ	JJ	Degree=Pos	3	amod	3:amod	_
3	enemy	enemy	NOUN	NN	Number=Sing	19	nsubj	6:nsubj|19:nsubj	SpaceAfter=No
4	,	,	PUNCT	,	_	3	punct	3:punct	_
5	which	which	PRON	WDT	PronType=Rel	6	nsubj	3:ref	_
6	gave	give	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	3	acl:relcl	3:acl:relcl	_
7	the	the	DET	DT	Definite=Def|PronType=Art	9	det	9:det	_
8	Indian	Indian	ADJ	JJ	Degree=Pos	9	amod	9:amod	_
9	army	army	NOUN	NN	Number=Sing	6	iobj	6:iobj	_
10	a	a	DET	DT	Definite=Ind|PronType=Art	12	det	12:det	_
11	black	black	ADJ	JJ	Degree=Pos	12	amod	12:amod	_
12	eye	eye	NOUN	NN	Number=Sing	6	obj	6:obj	_
13	in	in	ADP	IN	_	15	case	15:case	_
14	the	the	DET	DT	Definite=Def|PronType=Art	15	det	15:det	_
15	mid-1980s	mid-1980	NOUN	NNS	Number=Plur	6	obl	6:obl:in	SpaceAfter=No
16	,	,	PUNCT	,	_	19	punct	19:punct	_
17	has	have	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	19	aux	19:aux	_
18	been	be	AUX	VBN	Tense=Past|VerbForm=Part	19	aux	19:aux	_
19	operating	operate	VERB	VBG	Tense=Pres|VerbForm=Part	0	root	0:root	_
20	in	in	ADP	IN	_	22	case	22:case	_
21	northeastern	northeastern	ADJ	JJ	Degree=Pos	22	amod	22:amod	_
22	India	India	PROPN	NNP	Number=Sing	19	obl	19:obl:in	_
23	and	and	CCONJ	CC	_	27	cc	27:cc	_
24	in	in	ADP	IN	_	27	case	27:case	_
25	the	the	DET	DT	Definite=Def|PronType=Art	27	det	27:det	_
26	Andaman	Andaman	PROPN	NNP	Number=Sing	27	compound	27:compound	_
27	Sea	Sea	PROPN	NNP	Number=Sing	22	conj	19:obl:in|22:conj:and	_
28	for	for	ADP	IN	_	31	case	31:case	_
29	a	a	DET	DT	Definite=Ind|PronType=Art	31	det	31:det	_
30	long	long	ADJ	JJ	Degree=Pos	31	amod	31:amod	_
31	time	time	NOUN	NN	Number=Sing	19	obl	19:obl:for	SpaceAfter=No
32	.	.	PUNCT	.	_	19	punct	19:punct	_
