Question: who wrote the theme song for the waltons
[{'answer': 'Jerry Goldsmith', 'provenance': [{'wikipedia_id': '87678', 'title': 'The Waltons', 'start_paragraph_id': 23, 'start_character': 403, 'end_paragraph_id': 23, 'end_character': 418, 'bleu_score': 1.0, 'section': 'Section::::Production.:Television film.\n'}]}]