Question: who played sayuri in memoirs of a geisha
[{'answer': 'Ziyi Zhang', 'provenance': [{'wikipedia_id': '5541530', 'title': 'Memoirs of a Geisha (film)', 'start_paragraph_id': 1, 'start_character': 418, 'end_paragraph_id': 1, 'end_character': 428, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]