Question: who wrote the theme song to charlie brown
[{'answer': 'Vince Guaraldi', 'provenance': [{'wikipedia_id': '947573', 'title': 'Linus and Lucy', 'start_paragraph_id': 1, 'start_character': 64, 'end_paragraph_id': 1, 'end_character': 78, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]