Question: when was the last person executed in uk
[{'answer': '13 August 1964', 'provenance': [{'wikipedia_id': '275150', 'title': 'Capital punishment in the United Kingdom', 'start_paragraph_id': 39, 'start_character': 38, 'end_paragraph_id': 39, 'end_character': 52, 'bleu_score': 1.0, 'section': 'Section::::Abolition.:Last executions.\n'}]}, {'provenance': [{'wikipedia_id': '275150', 'title': 'Capital punishment in the United Kingdom', 'start_paragraph_id': 39, 'start_character': 0, 'end_paragraph_id': 39, 'end_character': 233, 'bleu_score': 0.9517713210466091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13562496127197793901}, 'section': 'Section::::Abolition.:Last executions.\n'}]}]