Question: who's doing the halftime show in 2018
[{'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': 8630446520893467140}, 'section': 'Section::::Abstract.'}]}]