Question: when's the last time michigan won the final four
[{'answer': '2018', 'provenance': [{'wikipedia_id': '14291424', 'title': "Michigan Wolverines men's basketball", 'start_paragraph_id': 56, 'start_character': 4, 'end_paragraph_id': 56, 'end_character': 8, 'bleu_score': 1.0, 'section': 'Section::::History.:Beilein era (2007–19).\n'}]}]