Question: who was britain's got talent winner 2015
[{'answer': "Jules O'Dwyer & Matisse", 'provenance': [{'wikipedia_id': '43010962', 'title': "Britain's Got Talent (series 9)", 'start_paragraph_id': 2, 'start_character': 43, 'end_paragraph_id': 2, 'end_character': 66, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]