Question: what is the currency used in vatican city
[{'answer': 'euro', 'provenance': [{'wikipedia_id': '3337602', 'title': 'Vatican lira', 'start_paragraph_id': 4, 'start_character': 42, 'end_paragraph_id': 4, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '3337602', 'title': 'Vatican lira', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 125, 'bleu_score': 0.9243880458347601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16352003968975905669}, 'section': 'Section::::History.\n'}]}]