Question: bank of england base rate what does it mean
[{'answer': 'overnight repurchase agreements', 'provenance': [{'wikipedia_id': '14002559', 'title': 'Official bank rate', 'start_paragraph_id': 1, 'start_character': 435, 'end_paragraph_id': 1, 'end_character': 466, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'key interest rate for enacting monetary policy'}, {'answer': 'the interest rate that the Bank of England charges Banks for secured overnight lending'}, {'provenance': [{'wikipedia_id': '14002559', 'title': 'Official bank rate', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 552, 'bleu_score': 0.978606533029418, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3950628278221599950}, 'section': 'Section::::Abstract.'}]}]