Question: when was the waltons first aired in uk
[{'answer': 'February 18 , 1974', 'provenance': [{'wikipedia_id': '87678', 'title': 'The Waltons', 'start_paragraph_id': 72, 'start_character': 133, 'end_paragraph_id': 72, 'end_character': 153, 'bleu_score': 1.0, 'section': 'Section::::Syndication.\n'}]}, {'provenance': [{'wikipedia_id': '87678', 'title': 'The Waltons', 'start_paragraph_id': 72, 'start_character': 0, 'end_paragraph_id': 72, 'end_character': 683, 'bleu_score': 0.9215489120007571, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15040483379753840753}, 'section': 'Section::::Syndication.\n'}]}]