Question: when did the hpv vaccine come out in usa
[{'answer': 'in 2006', 'provenance': [{'wikipedia_id': '3304705', 'title': 'HPV vaccine', 'start_paragraph_id': 4, 'start_character': 39, 'end_paragraph_id': 4, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3304705', 'title': 'HPV vaccine', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 456, 'bleu_score': 0.9754554449993441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8530991410779437214}, 'section': 'Section::::Abstract.'}]}]