Question: what did north korea do to south korea
[{'answer': 'invaded', 'provenance': [{'wikipedia_id': '325746', 'title': 'Division of Korea', 'start_paragraph_id': 3, 'start_character': 56, 'end_paragraph_id': 3, 'end_character': 63, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '325746', 'title': 'Division of Korea', 'start_paragraph_id': 35, 'start_character': 0, 'end_paragraph_id': 35, 'end_character': 618, 'bleu_score': 0.67908425005422, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1904037405998265464}, 'section': 'Section::::Korean War.\n'}]}]