Question: the side chain for valine is classified as a
[{'answer': 'isopropyl group', 'provenance': [{'wikipedia_id': '63554', 'title': 'Valine', 'start_paragraph_id': 1, 'start_character': 300, 'end_paragraph_id': 1, 'end_character': 315, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '63554', 'title': 'Valine', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 648, 'bleu_score': 0.8937576255717601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14651431684347471960}, 'section': 'Section::::Abstract.'}]}]