Question: who played anakin skywalker in revenge of the sith
[{'answer': 'Hayden Christensen', 'provenance': [{'wikipedia_id': '53736', 'title': 'Hayden Christensen', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '53736', 'title': 'Hayden Christensen', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 566, 'bleu_score': 0.8100735082904381, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2485132798358852711}, 'section': 'Section::::Abstract.'}]}]