Question: what is the latest generation of ipad 2018
[{'answer': 'sixth - generation', 'provenance': [{'wikipedia_id': '56956742', 'title': 'IPad (2018)', 'start_paragraph_id': 1, 'start_character': 21, 'end_paragraph_id': 1, 'end_character': 42, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '56956742', 'title': 'IPad (2018)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 416, 'bleu_score': 0.7544601912771131, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8040723511227275912}, 'section': 'Section::::Abstract.'}]}]