Question: who is performing at the world cup final 2018
[{'answer': 'Will Smith', 'provenance': [{'wikipedia_id': '55809099', 'title': '2018 FIFA World Cup Final', 'start_paragraph_id': 29, 'start_character': 157, 'end_paragraph_id': 29, 'end_character': 167, 'bleu_score': 1.0, 'section': 'Section::::Pre-match.:Closing ceremony.\n'}]}, {'answer': 'Nicky Jam', 'provenance': [{'wikipedia_id': '55809099', 'title': '2018 FIFA World Cup Final', 'start_paragraph_id': 29, 'start_character': 169, 'end_paragraph_id': 29, 'end_character': 178, 'bleu_score': 1.0, 'section': 'Section::::Pre-match.:Closing ceremony.\n'}]}, {'answer': 'Era Istrefi', 'provenance': [{'wikipedia_id': '55809099', 'title': '2018 FIFA World Cup Final', 'start_paragraph_id': 29, 'start_character': 184, 'end_paragraph_id': 29, 'end_character': 195, 'bleu_score': 1.0, 'section': 'Section::::Pre-match.:Closing ceremony.\n'}]}, {'answer': 'Opera singer Aida Garifullina', 'provenance': [{'wikipedia_id': '55809099', 'title': '2018 FIFA World Cup Final', 'start_paragraph_id': 29, 'start_character': 265, 'end_paragraph_id': 29, 'end_character': 294, 'bleu_score': 1.0, 'section': 'Section::::Pre-match.:Closing ceremony.\n'}]}, {'answer': "a children 's choir", 'provenance': [{'wikipedia_id': '55809099', 'title': '2018 FIFA World Cup Final', 'start_paragraph_id': 29, 'start_character': 348, 'end_paragraph_id': 29, 'end_character': 370, 'bleu_score': 1.0, 'section': 'Section::::Pre-match.:Closing ceremony.\n'}]}, {'answer': 'Brazilian star Ronaldinho', 'provenance': [{'wikipedia_id': '55809099', 'title': '2018 FIFA World Cup Final', 'start_paragraph_id': 29, 'start_character': 415, 'end_paragraph_id': 29, 'end_character': 440, 'bleu_score': 1.0, 'section': 'Section::::Pre-match.:Closing ceremony.\n'}]}, {'provenance': [{'wikipedia_id': '55809099', 'title': '2018 FIFA World Cup Final', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 440, 'bleu_score': 0.972782728923768, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8219066384657608001}, 'section': 'Section::::Pre-match.:Closing ceremony.\n'}]}]