Question: who controls the monetary policy of the eu
[{'answer': 'European Central Bank', 'provenance': [{'wikipedia_id': '9474', 'title': 'European Central Bank', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]