Question: hydrogen peroxide is the substrate for which enzyme
[{'answer': 'catalase', 'provenance': [{'wikipedia_id': '8526433', 'title': 'Substrate (chemistry)', 'start_paragraph_id': 8, 'start_character': 403, 'end_paragraph_id': 8, 'end_character': 411, 'bleu_score': 1.0, 'section': 'Section::::Biochemistry.\n'}]}, {'provenance': [{'wikipedia_id': '8526433', 'title': 'Substrate (chemistry)', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 612, 'bleu_score': 0.909891904163391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7025035605085810860}, 'section': 'Section::::Biochemistry.\n'}]}]