Question: who played stumpy in the movie rio bravo
[{'answer': 'Walter Brennan', 'provenance': [{'wikipedia_id': '81100', 'title': 'Rio Bravo (film)', 'start_paragraph_id': 1, 'start_character': 149, 'end_paragraph_id': 1, 'end_character': 163, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '81100', 'title': 'Rio Bravo (film)', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 436, 'bleu_score': 0.9735040436119741, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7277857307228554042}, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '81100', 'title': 'Rio Bravo (film)', 'start_paragraph_id': 24, 'start_character': 0, 'end_paragraph_id': 24, 'end_character': 36, 'bleu_score': 0.5081327481546141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7277857307228554042}, 'section': 'Section::::Cast.\n'}]}, {'provenance': [{'wikipedia_id': '81100', 'title': 'Rio Bravo (film)', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Rio Bravo is a 1959 American Western film produced and directed by Howard Hawks and starring John Wayne, Dean Martin, Ricky Nelson, Angie Dickinson, Walter Brennan, and Ward Bond. Written by Jules Furthman and Leigh Brackett, based on the short story "Rio Bravo" by B. H. McCampbell, the film is about the sheriff of the town of Rio Bravo, Texas, who arrests the brother of a powerful local rancher to help his drunken deputy/friend.', 'Rio Bravo is a 1959 American Western film produced and directed by Howard Hawks and starring John Wayne, Dean Martin, Ricky Nelson, Angie Dickinson, Walter Brennan', 'Rio Bravo is a 1959 American Western film produced and directed by Howard Hawks and starring John Wayne, Dean Martin, Ricky Nelson, Angie Dickinson, Walter Brennan,']}}]}]