Question: who has the most super bowl championships in the nfl
[{'answer': 'The Pittsburgh Steelers', 'provenance': [{'wikipedia_id': '2145410', 'title': 'List of Super Bowl champions', 'start_paragraph_id': 3, 'start_character': 762, 'end_paragraph_id': 3, 'end_character': 785, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2145410', 'title': 'List of Super Bowl champions', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 1830, 'bleu_score': 0.73273846046181, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5329361616048485414}, 'section': 'Section::::Abstract.'}]}]