Question: who is performing at the 2018 olympics opening ceremony
[{'answer': 'Lee Eun - mi'}, {'answer': "The Rainbow Children 's Choir", 'provenance': [{'wikipedia_id': '51310933', 'title': '2018 Winter Olympics opening ceremony', 'start_paragraph_id': 6, 'start_character': 12, 'end_paragraph_id': 6, 'end_character': 40, 'bleu_score': 1.0, 'section': 'Section::::Preparations.\n'}]}, {'answer': 'Insooni', 'provenance': [{'wikipedia_id': '51310933', 'title': '2018 Winter Olympics opening ceremony', 'start_paragraph_id': 7, 'start_character': 12, 'end_paragraph_id': 7, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Preparations.\n'}]}, {'answer': 'Jeon In - kwon with his band Deulgukhwa'}, {'answer': 'Ahn Ji - young of the musical duo Bolbbalgan4'}, {'answer': 'Ha Hyun - woo of the band Guckkasten'}]