Question: when was the last time the chicago bears won a championship
[{'answer': '2010', 'provenance': [{'wikipedia_id': '6611', 'title': 'Chicago Bears', 'start_paragraph_id': 34, 'start_character': 105, 'end_paragraph_id': 34, 'end_character': 109, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.:2004–2012: Lovie Smith era.\n'}]}]