Question: where is the national championship football game 2015
[{'answer': 'AT&T Stadium', 'provenance': [{'wikipedia_id': '41580877', 'title': '2015 College Football Playoff National Championship', 'start_paragraph_id': 1, 'start_character': 189, 'end_paragraph_id': 1, 'end_character': 201, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Arlington , Texas', 'provenance': [{'wikipedia_id': '41580877', 'title': '2015 College Football Playoff National Championship', 'start_paragraph_id': 1, 'start_character': 205, 'end_paragraph_id': 1, 'end_character': 224, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '41580877', 'title': '2015 College Football Playoff National Championship', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 560, 'bleu_score': 0.8975764152867001, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5780106026742659695}, 'section': 'Section::::Abstract.'}]}]