Question: who won the american got talent last year
[{'answer': 'Grace VanderWaal', 'provenance': [{'wikipedia_id': '4829129', 'title': "America's Got Talent", 'start_paragraph_id': 61, 'start_character': 197, 'end_paragraph_id': 61, 'end_character': 213, 'bleu_score': 1.0, 'section': 'Section::::Season synopses.:Season 11 (2016).\n'}]}]