Question: where is the pac 12 football championship played
[{'answer': "Levi 's Stadium", 'provenance': [{'wikipedia_id': '29049711', 'title': 'Pac-12 Football Championship Game', 'start_paragraph_id': 21, 'start_character': 124, 'end_paragraph_id': 21, 'end_character': 141, 'bleu_score': 1.0, 'section': 'Section::::Site selection criteria.\n'}]}, {'provenance': [{'wikipedia_id': '29049711', 'title': 'Pac-12 Football Championship Game', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 274, 'bleu_score': 0.832762216388487, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17966505950609197285}, 'section': 'Section::::Site selection criteria.\n'}]}]