Question: when did prevnar 13 come on the market
[{'answer': 'February 24 , 2010'}, {'provenance': [{'wikipedia_id': '5205924', 'title': 'Pneumococcal conjugate vaccine', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 524, 'bleu_score': 0.977139080690077, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7691914109855550716}, 'section': 'Section::::Abstract.'}]}]