Question: who won season nine of americas got talent
[{'answer': 'Mat Franco', 'provenance': [{'wikipedia_id': '4829129', 'title': "America's Got Talent", 'start_paragraph_id': 54, 'start_character': 32, 'end_paragraph_id': 54, 'end_character': 42, 'bleu_score': 1.0, 'section': 'Section::::Season synopses.:Season 9 (2014).\n'}]}]