Question: where is the heart located which body cavity what are the membranes that surround it
[{'answer': 'Thoracic cavity', 'provenance': [{'wikipedia_id': '74941', 'title': 'Body cavity', 'start_paragraph_id': 9, 'start_character': 209, 'end_paragraph_id': 9, 'end_character': 224, 'bleu_score': 1.0, 'section': 'Section::::Human body cavities.\n'}]}, {'answer': 'Pericardium', 'provenance': [{'wikipedia_id': '74941', 'title': 'Body cavity', 'start_paragraph_id': 6, 'start_character': 515, 'end_paragraph_id': 6, 'end_character': 526, 'bleu_score': 1.0, 'section': 'Section::::Mammals.\n'}]}, {'answer': 'Pleural cavity'}]