Question: when did the i pad air 2 come out
[{'answer': 'October 2014', 'provenance': [{'wikipedia_id': '25970423', 'title': 'IPad', 'start_paragraph_id': 20, 'start_character': 3, 'end_paragraph_id': 20, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '25970423', 'title': 'IPad', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 414, 'bleu_score': 0.895188560139314, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18065179709111481825}, 'section': 'Section::::History.\n'}]}]