Question: when was britain's war debt paid off
[{'answer': '2015', 'provenance': [{'wikipedia_id': '38771462', 'title': 'History of the British national debt', 'start_paragraph_id': 14, 'start_character': 640, 'end_paragraph_id': 14, 'end_character': 644, 'bleu_score': 1.0, 'section': 'Section::::World War I.\n'}]}, {'provenance': [{'wikipedia_id': '38771462', 'title': 'History of the British national debt', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 644, 'bleu_score': 0.953442195146827, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2839901314752876928}, 'section': 'Section::::World War I.\n'}]}]