Question: pace maker is related to which part of body
[{'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.'}]}, {'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': 2025126007675360840}, 'section': 'Section::::Abstract.'}]}]