Question: how many big 12 championships does ou have
[{'answer': '11', 'provenance': [{'wikipedia_id': '6321810', 'title': 'Oklahoma Sooners football', 'start_paragraph_id': 6, 'start_character': 142, 'end_paragraph_id': 6, 'end_character': 144, 'bleu_score': 1.0, 'section': 'Section::::History.:Early history (1895–1905).\n'}]}]