Question: what war is the abba song fernando about
[{'answer': 'The Mexican Revolution of 1910'}, {'provenance': [{'wikipedia_id': '2409221', 'title': 'Fernando (song)', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 624, 'bleu_score': 0.7705923891705211, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14859274518880964304}, 'section': 'Section::::English-language version.\n'}]}]