Question: what is the name of the currency of russia
[{'answer': 'ruble or rouble', 'provenance': [{'wikipedia_id': '233596', 'title': 'Russian ruble', 'start_paragraph_id': 1, 'start_character': 12, 'end_paragraph_id': 1, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '233596', 'title': 'Russian ruble', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 367, 'bleu_score': 0.698885339786378, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11084219524931422563}, 'section': 'Section::::Abstract.'}]}]