Question: who plays frank sinatra jr on family guy
[{'answer': 'Frank Sinatra Jr.', 'provenance': [{'wikipedia_id': '3322004', 'title': 'Brian Sings and Swings', 'start_paragraph_id': 1, 'start_character': 147, 'end_paragraph_id': 1, 'end_character': 164, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]