Question: what is the most common complication of acute myocardial infarction
[{'answer': 'second infarction', 'provenance': [{'wikipedia_id': '29083159', 'title': 'Myocardial infarction complications', 'start_paragraph_id': 1, 'start_character': 204, 'end_paragraph_id': 1, 'end_character': 221, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '29083159', 'title': 'Myocardial infarction complications', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 364, 'bleu_score': 0.9663744727315161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 159747095446060166}, 'section': 'Section::::Abstract.'}]}]