Question: who won the big ten basketball championship in 2017
[{'answer': 'by Michigan', 'provenance': [{'wikipedia_id': '50831127', 'title': "2017 Big Ten Conference Men's Basketball Tournament", 'start_paragraph_id': 1, 'start_character': 353, 'end_paragraph_id': 1, 'end_character': 364, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '50831127', 'title': "2017 Big Ten Conference Men's Basketball Tournament", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 675, 'bleu_score': 0.981898582188057, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14449384331973186130}, 'section': 'Section::::Abstract.'}]}]