Question: what do the british use to measure weight
[{'answer': 'stone', 'provenance': [{'wikipedia_id': '679929', 'title': 'Stone (unit)', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 9, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '679929', 'title': 'Stone (unit)', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 630, 'bleu_score': 0.9591116223104591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15729027277463118115}, 'section': 'Section::::Britain and Ireland.:United Kingdom and Ireland.\n'}]}]