Question: who won between john cena and the rock
[{'answer': 'The Rock', 'provenance': [{'wikipedia_id': '29206485', 'title': 'WrestleMania XXVIII', 'start_paragraph_id': 2, 'start_character': 123, 'end_paragraph_id': 2, 'end_character': 131, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '29206485', 'title': 'WrestleMania XXVIII', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 629, 'bleu_score': 0.9598415906376221, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15924258218048647516}, 'section': 'Section::::Abstract.'}]}]