Question: when was smoking banned in the workplace uk
[{'answer': '11 January 2006', 'provenance': [{'wikipedia_id': '5744399', 'title': 'Smoking ban in England', 'start_paragraph_id': 8, 'start_character': 3, 'end_paragraph_id': 8, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Passage of the law.\n'}]}, {'provenance': [{'wikipedia_id': '5744399', 'title': 'Smoking ban in England', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 601, 'bleu_score': 0.9796927878356411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17726811164911314966}, 'section': 'Section::::Passage of the law.\n'}]}]