Question: the heart chamber that acts as an entry for blood
[{'answer': 'the right atrium', 'provenance': [{'wikipedia_id': '36808', 'title': 'Heart', 'start_paragraph_id': 2, 'start_character': 151, 'end_paragraph_id': 2, 'end_character': 167, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '36808', 'title': 'Heart', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 950, 'bleu_score': 0.9652205951026711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17785897829066799593}, 'section': 'Section::::Abstract.'}]}]