Question: who played cornelius on planet of the apes
[{'answer': 'Roddy McDowall', 'provenance': [{'wikipedia_id': '29008383', 'title': 'List of Planet of the Apes characters', 'start_paragraph_id': 52, 'start_character': 273, 'end_paragraph_id': 52, 'end_character': 287, 'bleu_score': 1.0, 'section': 'Section::::Characters exclusive to "Planet of the Apes" (1968-1973).:Cornelius.\n'}]}, {'provenance': [{'wikipedia_id': '29008383', 'title': 'List of Planet of the Apes characters', 'start_paragraph_id': 52, 'start_character': 0, 'end_paragraph_id': 52, 'end_character': 329, 'bleu_score': 0.965203995518735, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13903979238607417984}, 'section': 'Section::::Characters exclusive to "Planet of the Apes" (1968-1973).:Cornelius.\n'}]}]