Question: how many times did roman reigns win the wwe championship
[{'answer': 'three', 'provenance': [{'wikipedia_id': '4373640', 'title': 'Roman Reigns', 'start_paragraph_id': 3, 'start_character': 78, 'end_paragraph_id': 3, 'end_character': 83, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]