In existing proposals, we can find both generic and specific mutation operators.
1	In	in	ADP	IN	_	3	case	3:case	Discourse=adversative-antithesis:101->102:1
2	existing	exist	VERB	VBG	VerbForm=Ger	3	amod	3:amod	Entity=(145-abstract-new-cf4-2-sgl
3	proposals	proposal	NOUN	NNS	Number=Plur	7	obl	7:obl:in	Entity=145)|SpaceAfter=No
4	,	,	PUNCT	,	_	3	punct	3:punct	_
5	we	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	7	nsubj	7:nsubj	Entity=(146-person-new-cf2-1-ana)
6	can	can	AUX	MD	VerbForm=Fin	7	aux	7:aux	_
7	find	find	VERB	VB	VerbForm=Inf	0	root	0:root	_
8	both	both	CCONJ	CC	_	9	cc:preconj	9:cc:preconj	Entity=(147-abstract-new-cf3-6-coref
9	generic	generic	ADJ	JJ	Degree=Pos	13	amod	13:amod	_
10	and	and	CCONJ	CC	_	11	cc	11:cc	_
11	specific	specific	ADJ	JJ	Degree=Pos	9	conj	9:conj:and|13:amod	_
12	mutation	mutation	NOUN	NN	Number=Sing	13	compound	13:compound	Entity=(22-abstract-giv:inact-cf1-1-coref)
13	operators	operator	NOUN	NNS	Number=Plur	7	obj	7:obj	Entity=147)|SpaceAfter=No
14	.	.	PUNCT	.	_	7	punct	7:punct	_
