Question: who is the winner of 2018 royal rumble
[{'answer': 'Asuka', 'provenance': [{'wikipedia_id': '52993846', 'title': 'Royal Rumble (2018)', 'start_paragraph_id': 2, 'start_character': 94, 'end_paragraph_id': 2, 'end_character': 99, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Shinsuke Nakamura', 'provenance': [{'wikipedia_id': '52993846', 'title': 'Royal Rumble (2018)', 'start_paragraph_id': 2, 'start_character': 328, 'end_paragraph_id': 2, 'end_character': 345, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '52993846', 'title': 'Royal Rumble (2018)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 758, 'bleu_score': 0.9480485738483061, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4786734202408155286}, 'section': 'Section::::Abstract.'}]}]