Database: browser_web
Question: Show the accelerator names and supporting operating systems that are not compatible with the browser named 'Opera'.
SQL: select name ,  operating_system from web_client_accelerator except select t1.name ,  t1.operating_system from web_client_accelerator as t1 join accelerator_compatible_browser as t2 on t2.accelerator_id  =  t1.id join browser as t3 on t2.browser_id  =  t3.id where t3.name  =  'opera'