Question: when was smoking banned in bars in california
[{'answer': 'January 1 , 1998'}, {'provenance': [{'wikipedia_id': '5718985', 'title': 'List of smoking bans in the United States', 'start_paragraph_id': 101, 'start_character': 0, 'end_paragraph_id': 101, 'end_character': 967, 'bleu_score': 0.973769062877963, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8098993752600573976}, 'section': 'Section::::Smoking laws of the United States by state or territory.:California.\n'}]}]