Question: how many times has duke won the final four
[{'answer': '5', 'provenance': [{'wikipedia_id': '8219053', 'title': "Duke Blue Devils men's basketball", 'start_paragraph_id': 2, 'start_character': 13, 'end_paragraph_id': 2, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8219053', 'title': "Duke Blue Devils men's basketball", 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 1134, 'bleu_score': 0.701475853229621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11148307554321547531}, 'section': 'Section::::Abstract.'}]}]