Question: when was the last time south korea had the olympics
[{'answer': '2018', 'provenance': [{'wikipedia_id': '8341295', 'title': 'South Korea at the Olympics', 'start_paragraph_id': 13, 'start_character': 46, 'end_paragraph_id': 13, 'end_character': 50, 'bleu_score': 1.0, 'section': 'Section::::Most successful Olympians.:Notes.\n'}]}]