Question: who is the senate majority leader in mr smith goes to washington
[{'answer': 'H.B. Warner'}, {'provenance': [{'wikipedia_id': '62117', 'title': 'Mr. Smith Goes to Washington', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 50, 'bleu_score': 0.51697315395717, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11875838590967499887}, 'section': 'Section::::Cast.\n'}]}]