Question: who was the ruler of north korea in 1950
[{'answer': 'Kim Il - sung', 'provenance': [{'wikipedia_id': '25084215', 'title': 'List of leaders of North Korea', 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 16, 'bleu_score': 1.0, 'section': 'Section::::Heads of state.\n'}]}]