Question: who won first season of americas got talent
[{'answer': 'Bianca Ryan', 'provenance': [{'wikipedia_id': '5766287', 'title': "America's Got Talent (season 1)", 'start_paragraph_id': 2, 'start_character': 35, 'end_paragraph_id': 2, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]