Question: when did the north and south korea war start
[{'answer': 'on 25 June 1950', 'provenance': [{'wikipedia_id': '16772', 'title': 'Korean War', 'start_paragraph_id': 1, 'start_character': 311, 'end_paragraph_id': 1, 'end_character': 326, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '16772', 'title': 'Korean War', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 410, 'bleu_score': 0.527809983748705, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 821331396157564208}, 'section': 'Section::::Abstract.'}]}]