Question: when were health warnings put on cigarette packets
[{'answer': '2003', 'provenance': [{'wikipedia_id': '1233983', 'title': 'Tobacco packaging warning messages', 'start_paragraph_id': 2, 'start_character': 60, 'end_paragraph_id': 2, 'end_character': 64, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1233983', 'title': 'Tobacco packaging warning messages', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 141, 'bleu_score': 0.9021315316859231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15435835517349973325}, 'section': 'Section::::Abstract.'}]}]