Question: what is the name of the vietnamese currency
[{'answer': 'đồng', 'provenance': [{'wikipedia_id': '875610', 'title': 'Vietnamese đồng', 'start_paragraph_id': 0, 'start_character': 11, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '875610', 'title': 'Vietnamese đồng', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 442, 'bleu_score': 0.8705824980160911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10465384752429165250}, 'section': 'Section::::Abstract.'}]}]