Question: when's the last time the chicago bears won the superbowl
[{'answer': '1985', 'provenance': [{'wikipedia_id': '6611', 'title': 'Chicago Bears', 'start_paragraph_id': 22, 'start_character': 130, 'end_paragraph_id': 22, 'end_character': 134, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.:1950s–1968: Late-Halas era.\n'}]}, {'provenance': [{'wikipedia_id': '6611', 'title': 'Chicago Bears', 'start_paragraph_id': 28, 'start_character': 0, 'end_paragraph_id': 28, 'end_character': 1222, 'bleu_score': 0.9147989530909341, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18320465874043692784}, 'section': 'Section::::Franchise history.:1983–1985: Contenders, then Super Bowl Champions.\n'}]}]