Question: who won the britain's got talent 2017
[{'answer': 'Tokio Myers', 'provenance': [{'wikipedia_id': '52552755', 'title': "Britain's Got Talent (series 11)", 'start_paragraph_id': 3, 'start_character': 40, 'end_paragraph_id': 3, 'end_character': 51, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]