Question: the heart is divided into how many parts
[{'answer': 'four', 'provenance': [{'wikipedia_id': '36808', 'title': 'Heart', 'start_paragraph_id': 2, 'start_character': 63, 'end_paragraph_id': 2, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '36808', 'title': 'Heart', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 671, 'bleu_score': 0.9822204502117851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15311470199038539993}, 'section': 'Section::::Abstract.'}]}]