Question: who wrote the song you're still a young man
[{'answer': 'Emilio Castillo', 'provenance': [{'wikipedia_id': '989173', 'title': 'Tower of Power', 'start_paragraph_id': 3, 'start_character': 50, 'end_paragraph_id': 3, 'end_character': 65, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'answer': 'Stephen Kupka', 'provenance': [{'wikipedia_id': '989173', 'title': 'Tower of Power', 'start_paragraph_id': 6, 'start_character': 497, 'end_paragraph_id': 6, 'end_character': 510, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '989173', 'title': 'Tower of Power', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 767, 'bleu_score': 0.9651324673660481, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6895607121227381155}, 'section': 'Section::::History.\n'}]}]