Question: where is the heart situated in human body
[{'answer': 'between the lungs', 'provenance': [{'wikipedia_id': '36808', 'title': 'Heart', 'start_paragraph_id': 1, 'start_character': 258, 'end_paragraph_id': 1, 'end_character': 275, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'in the middle compartment of the chest'}, {'provenance': [{'wikipedia_id': '36808', 'title': 'Heart', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 315, 'bleu_score': 0.916705652864192, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16699195347867438953}, 'section': 'Section::::Abstract.'}]}]