Question: when did smoking ban start in pubs uk
[{'answer': '1 July 2007', 'provenance': [{'wikipedia_id': '5744399', 'title': 'Smoking ban in England', 'start_paragraph_id': 1, 'start_character': 112, 'end_paragraph_id': 1, 'end_character': 123, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5744399', 'title': 'Smoking ban in England', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 330, 'bleu_score': 0.9684940092844061, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6807272487594872979}, 'section': 'Section::::Abstract.'}]}]