Question: who starred in butch cassidy and the sundance kid
[{'answer': 'Paul Newman', 'provenance': [{'wikipedia_id': '99031', 'title': 'Butch Cassidy and the Sundance Kid', 'start_paragraph_id': 1, 'start_character': 311, 'end_paragraph_id': 1, 'end_character': 322, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Robert Redford', 'provenance': [{'wikipedia_id': '99031', 'title': 'Butch Cassidy and the Sundance Kid', 'start_paragraph_id': 1, 'start_character': 379, 'end_paragraph_id': 1, 'end_character': 393, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Katharine Ross', 'provenance': [{'wikipedia_id': '99031', 'title': 'Butch Cassidy and the Sundance Kid', 'start_paragraph_id': 1, 'start_character': 515, 'end_paragraph_id': 1, 'end_character': 529, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Strother Martin', 'provenance': [{'wikipedia_id': '99031', 'title': 'Butch Cassidy and the Sundance Kid', 'start_paragraph_id': 16, 'start_character': 12, 'end_paragraph_id': 16, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}, {'answer': 'Jeff Corey', 'provenance': [{'wikipedia_id': '99031', 'title': 'Butch Cassidy and the Sundance Kid', 'start_paragraph_id': 61, 'start_character': 266, 'end_paragraph_id': 61, 'end_character': 276, 'bleu_score': 1.0, 'section': 'Section::::Legacy.\n'}]}, {'answer': 'Henry Jones', 'provenance': [{'wikipedia_id': '99031', 'title': 'Butch Cassidy and the Sundance Kid', 'start_paragraph_id': 17, 'start_character': 12, 'end_paragraph_id': 17, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}]