Question: when did the seattle supersonics move to oklahoma city
[{'answer': '2008 -- 09 basketball season'}, {'provenance': [{'wikipedia_id': '17003767', 'title': 'Seattle SuperSonics relocation to Oklahoma City', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 367, 'bleu_score': 0.847012293211405, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13329022556300154269}, 'section': 'Section::::Abstract.'}]}]