Question: Which Date has a MotoGP winner of Casey Stoner, and a 250cc winner of Hiroshi Aoyama?
SQL: SELECT "Date" FROM "2-15299235-1" WHERE "MotoGP winner" = 'Casey Stoner' AND "250cc winner" = 'Hiroshi Aoyama';

Question: Which 250cc winner has a 125cc winner of Bradley Smith, and a MotoGP winner of Casey Stoner?
SQL: SELECT "250cc winner" FROM "2-15299235-1" WHERE "125cc winner" = 'Bradley Smith' AND "MotoGP winner" = 'Casey Stoner';

Question: Which Round is the lowest one that has a Circuit of Donington?
SQL: SELECT MIN("Round") FROM "2-15299235-1" WHERE "Circuit" = 'Donington';

Question: Which MotoGP winner has a 250cc winner of Marco Simoncelli, and a Round of 15?
SQL: SELECT "MotoGP winner" FROM "2-15299235-1" WHERE "250cc winner" = 'Marco Simoncelli' AND "Round" = 15.0;

Question: Which 250cc winner has a 125cc winner of Bradley Smith, and a Circuit of Mugello?
SQL: SELECT "250cc winner" FROM "2-15299235-1" WHERE "125cc winner" = 'Bradley Smith' AND "Circuit" = 'Mugello';

Question: Which 250cc winner has a Round larger than 6, and a Date of 26 July?
SQL: SELECT "250cc winner" FROM "2-15299235-1" WHERE "Round" > 6.0 AND "Date" = '26 July';