These errors were formalized into mutation operators.
1	These	this	DET	DT	Number=Plur|PronType=Dem	2	det	2:det	Discourse=joint-other_m:46->31:7|Entity=(60-abstract-giv:act-cf1*-2-coref
2	errors	error	NOUN	NNS	Number=Plur	4	nsubj:pass	4:nsubj:pass	Entity=60)
3	were	be	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	4	aux:pass	4:aux:pass	_
4	formalized	formalize	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	0:root	_
5	into	into	ADP	IN	_	7	case	7:case	_
6	mutation	mutation	NOUN	NN	Number=Sing	7	compound	7:compound	Entity=(28-abstract-giv:inact-cf3-2-coref(22-abstract-giv:act-cf2-1-coref)
7	operators	operator	NOUN	NNS	Number=Plur	4	obl	4:obl:into	Entity=28)|SpaceAfter=No
8	.	.	PUNCT	.	_	4	punct	4:punct	_
