Question: what type of measurement does the uk use
[{'answer': 'metric system', 'provenance': [{'wikipedia_id': '2732151', 'title': 'Metrication in the United Kingdom', 'start_paragraph_id': 1, 'start_character': 66, 'end_paragraph_id': 1, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2732151', 'title': 'Metrication in the United Kingdom', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 764, 'bleu_score': 0.956047202777158, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4941933347919666044}, 'section': 'Section::::Abstract.'}]}]