Question: pace maker is associated with which body organ
[{'answer': 'heart', 'provenance': [{'wikipedia_id': '80732', 'title': 'Artificial cardiac pacemaker', 'start_paragraph_id': 1, 'start_character': 97, 'end_paragraph_id': 1, 'end_character': 102, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the heart', 'provenance': [{'wikipedia_id': '80732', 'title': 'Artificial cardiac pacemaker', 'start_paragraph_id': 1, 'start_character': 93, 'end_paragraph_id': 1, 'end_character': 102, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '80732', 'title': 'Artificial cardiac pacemaker', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 229, 'bleu_score': 0.5308776459423951, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6702183280867757144}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '233429', 'title': 'Cardiac pacemaker', 'section': 'Section::::Control.:Secondary (AV junction and Bundle of His).\n', 'start_paragraph_id': 10, 'end_paragraph_id': 10, 'meta': {'evidence_span': ['If the SA node does not function properly and is unable to control the heart rate, a group of cells further down the heart will become the ectopic pacemaker of the heart.', 'If the SA node does not function properly and is unable to control the heart rate, a group of cells further down the heart will become the ectopic pacemaker of the heart']}}]}, {'provenance': [{'wikipedia_id': '80732', 'title': 'Artificial cardiac pacemaker', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['A pacemaker (or artificial pacemaker, so as not to be confused with the natural pacemaker of the heart) is a medical device that generates electrical impulses delivered by electrodes to contract the heart muscles and regulate the electrical conduction system of the heart.', 'A pacemaker (or artificial pacemaker, so as not to be confused with the natural pacemaker of the heart) is a medical device that generates electrical impulses delivered by electrodes to contract the heart muscles and regulate the electrical conduction system of the heart.', 'A pacemaker (or artificial pacemaker, so as not to be confused with the natural pacemaker of the heart) is a medical device that generates electrical impulses delivered by electrodes to contract the heart muscles and regulate the electrical conduction system of the heart.']}}]}]