Question: when have the bills been in the super bowl
[{'answer': '1990', 'provenance': [{'wikipedia_id': '2145410', 'title': 'List of Super Bowl champions', 'start_paragraph_id': 3, 'start_character': 334, 'end_paragraph_id': 3, 'end_character': 338, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '1991', 'provenance': [{'wikipedia_id': '2145410', 'title': 'List of Super Bowl champions', 'start_paragraph_id': 69, 'start_character': 39, 'end_paragraph_id': 69, 'end_character': 43, 'bleu_score': 1.0, 'section': 'Section::::Super Bowl appearances by team.:Teams with long Super Bowl droughts.\n'}]}, {'answer': '1992', 'provenance': [{'wikipedia_id': '2145410', 'title': 'List of Super Bowl champions', 'start_paragraph_id': 3, 'start_character': 975, 'end_paragraph_id': 3, 'end_character': 979, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '1993', 'provenance': [{'wikipedia_id': '2145410', 'title': 'List of Super Bowl champions', 'start_paragraph_id': 3, 'start_character': 342, 'end_paragraph_id': 3, 'end_character': 346, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]