Question: who did the last super bowl halftime show
[{'answer': 'Justin Timberlake', 'provenance': [{'wikipedia_id': '1730307', 'title': 'List of Super Bowl halftime shows', 'start_paragraph_id': 2, 'start_character': 714, 'end_paragraph_id': 2, 'end_character': 731, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the Tennessee Kids'}, {'answer': 'University of Minnesota Marching Band'}]