Question: when was sussex split into east and west
[{'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': 69, 'start_character': 0, 'end_paragraph_id': 69, 'end_character': 540, 'bleu_score': 0.9757530668325981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15560417490607004700}, 'section': 'Section::::Late modern and contemporary Sussex.\n'}]}]