Question: what kind of voice did frank sinatra have
[{'answer': 'baritone', 'provenance': [{'wikipedia_id': '11891515', 'title': "Frank Sinatra's recorded legacy", 'start_paragraph_id': 7, 'start_character': 148, 'end_paragraph_id': 7, 'end_character': 156, 'bleu_score': 1.0, 'section': "Section::::Sinatra's voice.\n"}]}, {'provenance': [{'wikipedia_id': '11891515', 'title': "Frank Sinatra's recorded legacy", 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 1184, 'bleu_score': 0.990970423521577, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8225852585629254870}, 'section': "Section::::Sinatra's voice.\n"}]}]