Question: when did the ipad 6 generation come out
[{'answer': 'March 27 , 2018', 'provenance': [{'wikipedia_id': '56956742', 'title': 'IPad (2018)', 'start_paragraph_id': 1, 'start_character': 149, 'end_paragraph_id': 1, 'end_character': 164, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]