Question: when did sussex split into east and west
[{'answer': '1832', 'provenance': [{'wikipedia_id': '1139890', 'title': 'History of Sussex', 'start_paragraph_id': 65, 'start_character': 848, 'end_paragraph_id': 65, 'end_character': 852, 'bleu_score': 1.0, 'section': 'Section::::Late modern and contemporary Sussex.\n'}]}, {'answer': '1889', 'provenance': [{'wikipedia_id': '1139890', 'title': 'History of Sussex', 'start_paragraph_id': 66, 'start_character': 129, 'end_paragraph_id': 66, 'end_character': 133, 'bleu_score': 1.0, 'section': 'Section::::Late modern and contemporary Sussex.\n'}]}, {'provenance': [{'wikipedia_id': '1139890', 'title': 'History of Sussex', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13560964976631938947}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1139890', 'title': 'History of Sussex', 'section': 'Section::::Parliamentary history.\n', 'start_paragraph_id': 96, 'end_paragraph_id': 96, 'meta': {'evidence_span': ['Although there had been various proposals to reform the system from 1770, it was not till 1830 when a series of factors saw the Reform Act 1832 introduced.', 'After the Reform Act of 1832 Sussex was divided into the "eastern division" and the', 'After the Reform Act of 1832 Sussex was divided into the "eastern division"']}}]}, {'provenance': [{'wikipedia_id': '1139890', 'title': 'History of Sussex', 'section': 'Section::::Late modern and contemporary Sussex.\n', 'start_paragraph_id': 66, 'end_paragraph_id': 66, 'meta': {'evidence_span': ["Railways spread across Sussex in the 19th century and county councils were created for Sussex's eastern and western divisions in 1889.", "Railways spread across Sussex in the 19th century and county councils were created for Sussex's eastern and western divisions in 1889.", "Railways spread across Sussex in the 19th century and county councils were created for Sussex's eastern and western divisions in 1889."]}}]}]