Question: when did the newest macbook air come out
[{'answer': 'June 10 , 2013', 'provenance': [{'wikipedia_id': '15183570', 'title': 'MacBook Air', 'start_paragraph_id': 19, 'start_character': 3, 'end_paragraph_id': 19, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Second generation (Tapered and dual USB).\n'}]}, {'provenance': [{'wikipedia_id': '15183570', 'title': 'MacBook Air', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 855, 'bleu_score': 0.8825826388999961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7594415094991778449}, 'section': 'Section::::Second generation (Tapered and dual USB).\n'}]}]