Question: where did the last name nieves come from
[{'answer': 'Spain', 'provenance': [{'wikipedia_id': '18039496', 'title': 'Nieves', 'start_paragraph_id': 1, 'start_character': 312, 'end_paragraph_id': 1, 'end_character': 317, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]