Question: when did south korea and north korea split
[{'answer': 'May 1946', 'provenance': [{'wikipedia_id': '325746', 'title': 'Division of Korea', 'start_paragraph_id': 26, 'start_character': 496, 'end_paragraph_id': 26, 'end_character': 504, 'bleu_score': 1.0, 'section': 'Section::::Post–World War II.:US–Soviet Joint Commission.\n'}]}, {'provenance': [{'wikipedia_id': '325746', 'title': 'Division of Korea', 'start_paragraph_id': 26, 'start_character': 14, 'end_paragraph_id': 26, 'end_character': 568, 'bleu_score': 0.7461822757847391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3877816918142386606}, 'section': 'Section::::Post–World War II.:US–Soviet Joint Commission.\n'}]}]