Question: who lost the most super bowls in nfl history
[{'answer': 'Minnesota Vikings', 'provenance': [{'wikipedia_id': '2145410', 'title': 'List of Super Bowl champions', 'start_paragraph_id': 3, 'start_character': 570, 'end_paragraph_id': 3, 'end_character': 587, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Buffalo Bills', 'provenance': [{'wikipedia_id': '2145410', 'title': 'List of Super Bowl champions', 'start_paragraph_id': 3, 'start_character': 251, 'end_paragraph_id': 3, 'end_character': 264, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]