Question: when was the first £50 note issued
[{'answer': '1725', 'provenance': [{'wikipedia_id': '50355179', 'title': 'Bank of England £50 note', 'start_paragraph_id': 4, 'start_character': 71, 'end_paragraph_id': 4, 'end_character': 75, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '50355179', 'title': 'Bank of England £50 note', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 1032, 'bleu_score': 0.97245073043796, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5090652509740053871}, 'section': 'Section::::History.\n'}]}]