Question: when was the last time oklahoma won a national championship in football
[{'answer': '2000', 'provenance': [{'wikipedia_id': '6321810', 'title': 'Oklahoma Sooners football', 'start_paragraph_id': 40, 'start_character': 3, 'end_paragraph_id': 40, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::History.:Bob Stoops era (1999–2016).:1999–2002: Return to glory.\n'}]}, {'answer': '2003', 'provenance': [{'wikipedia_id': '6321810', 'title': 'Oklahoma Sooners football', 'start_paragraph_id': 40, 'start_character': 2405, 'end_paragraph_id': 40, 'end_character': 2409, 'bleu_score': 1.0, 'section': 'Section::::History.:Bob Stoops era (1999–2016).:1999–2002: Return to glory.\n'}]}, {'provenance': [{'wikipedia_id': '6321810', 'title': 'Oklahoma Sooners football', 'section': 'Section::::History.:Bob Stoops era (1999–2016).:Back to back BCS championship appearances (2003–2004).\n', 'start_paragraph_id': 42, 'end_paragraph_id': 42, 'meta': {'evidence_span': ['many years to Oklahoma State, and an upset loss to Texas A&M 3026. The team\'s national success reemerged in the 2003 and 2004 seasons. The 2003 team was the highest scoring squad (at the time) in Oklahoma\'s storied history, scoring 601\xa0points to their opponents 214. The season included seven games of 50\xa0points or more with the highlights including a 770 drubbing of Texas A&M and a 6513 defeat of Texas. The team, led by Heisman Trophy winner Jason White, was billed as one of "the greatest college football teams of all time." This assumption was short-lived as the Sooners were upset in the Big 12 Championship Game by Kansas State.', 'many years to Oklahoma State, and an upset loss to Texas A&M 3026. The team\'s national success reemerged in the 2003 and 2004 seasons. The 2003 team was the highest scoring squad (at the time) in Oklahoma\'s storied history, scoring 601\xa0points to their opponents 214. The season included seven games of 50\xa0points or more with the highlights including a 770 drubbing of Texas A&M and a 6513 defeat of Texas. The team, led by Heisman Trophy winner Jason White, was billed as one of "the greatest college football teams of all time." This assumption was short-lived as the Sooners were upset in the Big 12 Championship Game by Kansas State. Prior to the Big 12 Title Game, the Sooners Defensive Coordinator, Mike Stoops, accepted the head coaching position at Arizona, becoming the third Sooners coordinator to take a head coaching job during the Stoops era. Due to their impressive strength of schedule, the Sooners were able to retain their position in the polls and their chance for the title. In a warm night in New Orleans, the Sooners were handed their second consecutive defeat and their first title loss; this time to LSU squad by a score of 2114. The heartbreaking defeats shocked the "Sooner Nation" while conversely establishing the team as a perennial title contender. In 2004, the Sooners were able to reach the Orange Bowl undefeated, along with USC. Although the Sooners lost in the title game 5519, USC later vacated the win due to NCAA infractions.', "many years to Oklahoma State, and an upset loss to Texas A&M 3026. The team's national success reemerged in the 2003 and 2004 seasons. The 2003 team was the highest scoring squad (at the time) in Oklahoma's storied history, scoring 601\xa0points to their opponents 214."]}}]}]