Question: what are the different generations of ipad mini
[{'answer': '1st generation'}, {'answer': '2', 'provenance': [{'wikipedia_id': '37422285', 'title': 'IPad Mini', 'start_paragraph_id': 1, 'start_character': 326, 'end_paragraph_id': 1, 'end_character': 327, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '3', 'provenance': [{'wikipedia_id': '37422285', 'title': 'IPad Mini', 'start_paragraph_id': 1, 'start_character': 327, 'end_paragraph_id': 1, 'end_character': 328, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '4', 'provenance': [{'wikipedia_id': '37422285', 'title': 'IPad Mini', 'start_paragraph_id': 2, 'start_character': 211, 'end_paragraph_id': 2, 'end_character': 212, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]