Question: when did the ps vita slim come out
[{'answer': 'on October 10 , 2013', 'provenance': [{'wikipedia_id': '26694626', 'title': 'PlayStation Vita', 'start_paragraph_id': 28, 'start_character': 50, 'end_paragraph_id': 28, 'end_character': 70, 'bleu_score': 1.0, 'section': 'Section::::Hardware.:Revised model.\n'}]}, {'answer': 'on February 7 , 2014', 'provenance': [{'wikipedia_id': '26694626', 'title': 'PlayStation Vita', 'start_paragraph_id': 28, 'start_character': 81, 'end_paragraph_id': 28, 'end_character': 104, 'bleu_score': 1.0, 'section': 'Section::::Hardware.:Revised model.\n'}]}, {'provenance': [{'wikipedia_id': '26694626', 'title': 'PlayStation Vita', 'start_paragraph_id': 28, 'start_character': 0, 'end_paragraph_id': 28, 'end_character': 1105, 'bleu_score': 0.972791660287272, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12370578525774214983}, 'section': 'Section::::Hardware.:Revised model.\n'}]}]