Question: an active protein enzyme in the stomach that begins the chemical digestion of protein is called
[{'answer': 'digestive enzymes', 'provenance': [{'wikipedia_id': '165423', 'title': 'Digestion', 'start_paragraph_id': 1, 'start_character': 560, 'end_paragraph_id': 1, 'end_character': 577, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '165423', 'title': 'Digestion', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 667, 'bleu_score': 0.9812185674664711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5279734897264123483}, 'section': 'Section::::Abstract.'}]}]