Question: who won the last britain's got talent
[{'answer': 'Pianist Tokio Myers', 'provenance': [{'wikipedia_id': '31987482', 'title': "List of Britain's Got Talent finalists", 'start_paragraph_id': 4, 'start_character': 621, 'end_paragraph_id': 4, 'end_character': 640, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31987482', 'title': "List of Britain's Got Talent finalists", 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 672, 'bleu_score': 0.9823771291847391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14104337314000571800}, 'section': 'Section::::Abstract.'}]}]