Question: who has won the most united states championships
[{'answer': 'Ric Flair', 'provenance': [{'wikipedia_id': '985725', 'title': 'List of WWE United States Champions', 'start_paragraph_id': 4, 'start_character': 49, 'end_paragraph_id': 4, 'end_character': 58, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Lex Luger', 'provenance': [{'wikipedia_id': '985725', 'title': 'List of WWE United States Champions', 'start_paragraph_id': 4, 'start_character': 190, 'end_paragraph_id': 4, 'end_character': 199, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '985725', 'title': 'List of WWE United States Champions', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1421302230354213409}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '985725', 'title': 'List of WWE United States Champions', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 538, 'bleu_score': 0.9545695715275291, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1421302230354213409}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '985725', 'title': 'List of WWE United States Champions', 'section': 'Section::::Abstract.', 'start_paragraph_id': 4, 'end_paragraph_id': 4, 'meta': {'evidence_span': ["Overall, there have been 95 different champions. Ric Flair holds the record for having the most reigns at six, while John Cena holds the record for most reigns under the WWE banner at five. Lex Luger holds the record for the longest reign, with his third reign lasting a total of 523 days, while Dean Ambrose holds the longest reign under the WWE banner, at 351 days (overall the third longest in the title's history)", 'Only two men, Lex Luger and Rick Rude, have held the championship for a continuous reign of one year (365 days) or more, while the shortest-reigning champion, Steve Austin, held it for five minutes.', "Overall, there have been 95 different champions. Ric Flair holds the record for having the most reigns at six, while John Cena holds the record for most reigns under the WWE banner at five. Lex Luger holds the record for the longest reign, with his third reign lasting a total of 523 days, while Dean Ambrose holds the longest reign under the WWE banner, at 351 days (overall the third longest in the title's history). Only two men, Lex Luger and Rick Rude, have held the championship for a continuous reign of one year (365 days) or more, while the shortest-reigning champion, Steve Austin, held it for five minutes."]}}]}]