Question: who won the ncaa basketball championship in 1989
[{'answer': 'Michigan', 'provenance': [{'wikipedia_id': '4381086', 'title': "1989 NCAA Division I Men's Basketball Tournament", 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 8, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]