Question: when was the last time korea was united
[{'answer': 'in 1945', 'provenance': [{'wikipedia_id': '48605', 'title': 'History of Korea', 'start_paragraph_id': 9, 'start_character': 30, 'end_paragraph_id': 9, 'end_character': 37, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '48605', 'title': 'History of Korea', 'start_paragraph_id': 9, 'start_character': 27, 'end_paragraph_id': 9, 'end_character': 999, 'bleu_score': 0.8755048961490911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9313991310340900029}, 'section': 'Section::::Abstract.'}]}]