Question: who played boo in to kill a mocking bird
[{'answer': 'Robert Duvall', 'provenance': [{'wikipedia_id': '4607980', 'title': 'To Kill a Mockingbird (film)', 'start_paragraph_id': 1, 'start_character': 304, 'end_paragraph_id': 1, 'end_character': 317, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4607980', 'title': 'To Kill a Mockingbird (film)', 'start_paragraph_id': 26, 'start_character': 0, 'end_paragraph_id': 26, 'end_character': 48, 'bleu_score': 0.6803749333171201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10670793728718639432}, 'section': 'Section::::Cast.\n'}]}]