Mutation-based testing [1] is a test technique that involves artificially introducing errors into a System Under Test (SUT).
1	Mutation	mutation	NOUN	NN	Number=Sing	3	compound	3:compound	Discourse=context-background:16->31:5|Entity=(29-abstract-giv:inact-cf1-4-coref|SpaceAfter=No|XML=<w>
2	-	-	PUNCT	HYPH	_	1	punct	1:punct	SpaceAfter=No
3	based	base	VERB	VBN	Tense=Past|VerbForm=Part	4	amod	4:amod	XML=</w>
4	testing	testing	NOUN	NN	Number=Sing	11	nsubj	11:nsubj	Entity=29)
5	[	[	PUNCT	-LRB-	_	6	punct	6:punct	Discourse=explanation-evidence:17->16:0|SpaceAfter=No|XML=<ref>
6	1	1	NUM	CD	NumForm=Digit|NumType=Card	4	appos	4:appos	Entity=(31-abstract-new-cf4-1-sgl)|SpaceAfter=No
7	]	]	PUNCT	-RRB-	_	6	punct	6:punct	XML=</ref>
8	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	cop	11:cop	Discourse=same-unit_m:18->16:1
9	a	a	DET	DT	Definite=Ind|PronType=Art	11	det	11:det	Entity=(29-abstract-giv:act-cf1-3-pred
10	test	test	NOUN	NN	Number=Sing	11	compound	11:compound	_
11	technique	technique	NOUN	NN	Number=Sing	0	root	0:root|13:nsubj	_
12	that	that	PRON	WDT	PronType=Rel	13	nsubj	11:ref	Discourse=elaboration-attribute:19->16:2
13	involves	involve	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	acl:relcl	11:acl:relcl	_
14	artificially	artificially	ADV	RB	Degree=Pos	15	advmod	15:advmod	_
15	introducing	introduce	VERB	VBG	VerbForm=Ger	13	xcomp	13:xcomp	_
16	errors	error	NOUN	NNS	Number=Plur	15	obj	15:obj	Entity=(32-abstract-new-cf3-1-sgl)
17	into	into	ADP	IN	_	19	case	19:case	_
18	a	a	DET	DT	Definite=Ind|PronType=Art	19	det	19:det	Entity=(33-abstract-new-cf2-2-coref
19	System	system	NOUN	NN	Number=Sing	15	obl	15:obl:into	_
20	Under	under	ADP	IN	_	21	case	21:case	_
21	Test	test	NOUN	NN	Number=Sing	19	nmod	19:nmod:under	Entity=33)
22	(	(	PUNCT	-LRB-	_	23	punct	23:punct	Discourse=restatement-partial:20->19:0|SpaceAfter=No
23	SUT	SUT	NOUN	NN	Number=Sing	19	appos	19:appos	Entity=(33-abstract-giv:act-cf2-1-appos)|SpaceAfter=No
24	)	)	PUNCT	-RRB-	_	23	punct	23:punct	Entity=29)|SpaceAfter=No
25	.	.	PUNCT	.	_	11	punct	11:punct	_
