Question: how to change group of file in unix
[{'answer': 'chgrp', 'provenance': [{'wikipedia_id': '1524402', 'title': 'Chgrp', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 9, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1524402', 'title': 'Chgrp', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 433, 'bleu_score': 0.976327165973018, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15068558646855666885}, 'section': 'Section::::Abstract.'}]}]