Question: what organ produces chyme as a result of mechanical digestion
[{'answer': 'the stomach', 'provenance': [{'wikipedia_id': '351616', 'title': 'Chyme', 'start_paragraph_id': 1, 'start_character': 122, 'end_paragraph_id': 1, 'end_character': 133, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '351616', 'title': 'Chyme', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 217, 'bleu_score': 0.803333163928579, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7393908564534331944}, 'section': 'Section::::Abstract.'}]}]