Question: who won america's got talent 2017 finals
[{'answer': 'Darci Lynne Farmer', 'provenance': [{'wikipedia_id': '51620827', 'title': "America's Got Talent (season 12)", 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]