Question: who is doing 2018 super bowl half time show
[{'answer': 'Justin Timberlake', 'provenance': [{'wikipedia_id': '45280353', 'title': 'Super Bowl LII halftime show', 'start_paragraph_id': 1, 'start_character': 200, 'end_paragraph_id': 1, 'end_character': 217, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '45280353', 'title': 'Super Bowl LII halftime show', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 352, 'bleu_score': 0.9663744727315161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9304079710958573871}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '45280353', 'title': 'Super Bowl LII halftime show', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Justin Timberlake was the featured performer,', 'Justin Timberlake was the featured performer, as confirmed by the National Football League (NFL) on October 22, 2017. It was televised nationally by NBC. It received four nominations at the 70th Primetime Emmy Awards']}}]}]