Question: when did the uk change from fahrenheit to celsius
[{'answer': '1970', 'provenance': [{'wikipedia_id': '2732151', 'title': 'Metrication in the United Kingdom', 'start_paragraph_id': 29, 'start_character': 454, 'end_paragraph_id': 29, 'end_character': 458, 'bleu_score': 1.0, 'section': 'Section::::1965 onwards.\n'}]}, {'provenance': [{'wikipedia_id': '2732151', 'title': 'Metrication in the United Kingdom', 'start_paragraph_id': 70, 'start_character': 0, 'end_paragraph_id': 70, 'end_character': 175, 'bleu_score': 0.521426953162598, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6933365765061674024}, 'section': 'Section::::1965 onwards.:Other sectors.\n'}]}]