Question: which chamber of the heart pumps blood into the pulmonary artery
[{'answer': 'right ventricle', 'provenance': [{'wikipedia_id': '598465', 'title': 'Pulmonary circulation', 'start_paragraph_id': 1, 'start_character': 114, 'end_paragraph_id': 1, 'end_character': 129, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '598465', 'title': 'Pulmonary circulation', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 410, 'bleu_score': 0.92860998190983, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14045153414286445725}, 'section': 'Section::::Structure.\n'}]}]