Question: who won the big ten basketball championship this year
[{'answer': 'Michigan', 'provenance': [{'wikipedia_id': '3693381', 'title': "Big Ten Conference Men's Basketball Tournament", 'start_paragraph_id': 2, 'start_character': 111, 'end_paragraph_id': 2, 'end_character': 119, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]