Question: when was the last public execution in britain
[{'answer': 'Michael Barrett', 'provenance': [{'wikipedia_id': '5427343', 'title': 'Michael Barrett (Fenian)', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5427343', 'title': 'Michael Barrett (Fenian)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 154, 'bleu_score': 0.813666394221037, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8314499951759212698}, 'section': 'Section::::Abstract.'}]}]