Question: when did north and south korea become separate countries
[{'answer': '1948', 'provenance': [{'wikipedia_id': '325746', 'title': 'Division of Korea', 'start_paragraph_id': 2, 'start_character': 154, 'end_paragraph_id': 2, 'end_character': 158, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '325746', 'title': 'Division of Korea', 'start_paragraph_id': 2, 'start_character': 171, 'end_paragraph_id': 2, 'end_character': 722, 'bleu_score': 0.674186265396665, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11624878117450204516}, 'section': 'Section::::Abstract.'}]}]