Question: when was the last time the bengals went to the superbowl
[{'answer': '1988', 'provenance': [{'wikipedia_id': '6612', 'title': 'Cincinnati Bengals', 'start_paragraph_id': 32, 'start_character': 143, 'end_paragraph_id': 32, 'end_character': 147, 'bleu_score': 1.0, 'section': 'Section::::Contributions to NFL culture.:No-huddle offense.\n'}]}]