Question: when was the last time england won ashes in australia
[{'answer': '2015'}, {'provenance': [{'wikipedia_id': '1930107', 'title': 'List of Ashes series', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 451, 'bleu_score': 0.8554795620007961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3832945976792249483}, 'section': 'Section::::Abstract.'}]}]