過則勿憚改
[{"id": "1", "form": "過", "pos": "ADV", "head": "4", "deprel": "advmod"}, {"id": "2", "form": "則", "pos": "ADV", "head": "4", "deprel": "advmod"}, {"id": "3", "form": "勿", "pos": "ADV", "head": "4", "deprel": "advmod"}, {"id": "4", "form": "憚", "pos": "VERB", "head": "0", "deprel": "root"}, {"id": "5", "form": "改", "pos": "VERB", "head": "4", "deprel": "obj"}]