Question: when did the song jar of hearts come out
[{'answer': 'July 27 , 2010', 'provenance': [{'wikipedia_id': '27975110', 'title': 'Jar of Hearts', 'start_paragraph_id': 6, 'start_character': 105, 'end_paragraph_id': 6, 'end_character': 119, 'bleu_score': 1.0, 'section': 'Section::::Background and release.\n'}]}, {'provenance': [{'wikipedia_id': '27975110', 'title': 'Jar of Hearts', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 622, 'bleu_score': 0.94526232963177, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9010924186303386518}, 'section': 'Section::::Abstract.'}]}]