Question: who won the 2017 big ten football championship
[{'answer': 'Ohio State', 'provenance': [{'wikipedia_id': '53220616', 'title': '2017 Big Ten Football Championship Game', 'start_paragraph_id': 7, 'start_character': 11, 'end_paragraph_id': 7, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Teams.:Wisconsin Badgers.\n'}]}]