Question: what is the name of the currency used in the european union
[{'answer': 'the euro', 'provenance': [{'wikipedia_id': '40042831', 'title': 'List of currencies in Europe', 'start_paragraph_id': 2, 'start_character': 119, 'end_paragraph_id': 2, 'end_character': 127, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '40042831', 'title': 'List of currencies in Europe', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 709, 'bleu_score': 0.8174256594044871, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 927393246966995434}, 'section': 'Section::::Abstract.'}]}]