Question: who is the main character in memoirs of a geisha
[{'answer': 'Chiyo Sakamoto', 'provenance': [{'wikipedia_id': '5541530', 'title': 'Memoirs of a Geisha (film)', 'start_paragraph_id': 1, 'start_character': 720, 'end_paragraph_id': 1, 'end_character': 734, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': "`` Sayuri ''"}, {'provenance': [{'wikipedia_id': '5541530', 'title': 'Memoirs of a Geisha (film)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1029, 'bleu_score': 0.9883376938421391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11406299514576191155}, 'section': 'Section::::Abstract.'}]}]