Question: when did the song lost boy come out
[{'answer': 'February 12 , 2015', 'provenance': [{'wikipedia_id': '49392279', 'title': 'Lost Boy (Ruth B song)', 'start_paragraph_id': 4, 'start_character': 443, 'end_paragraph_id': 4, 'end_character': 461, 'bleu_score': 1.0, 'section': 'Section::::Composition and history.\n'}]}, {'provenance': [{'wikipedia_id': '49392279', 'title': 'Lost Boy (Ruth B song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 171, 'bleu_score': 0.9402297675816911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14928711942093292931}, 'section': 'Section::::Abstract.'}]}]