Question: Which competition has a Year of 2008, a Surface of carpet, and a Date of 31 Jan?
SQL: SELECT "Competition" FROM "2-11233501-4" WHERE "Year" = 2008.0 AND "Surface" = 'carpet' AND "Date" = '31 Jan';

Question: Which surface has a Date of 24–25 Apr?
SQL: SELECT "Surface" FROM "2-11233501-4" WHERE "Date" = '24–25 Apr';

Question: How many years have a Surface of clay, and a Score of 4 : 0?
SQL: SELECT COUNT("Year") FROM "2-11233501-4" WHERE "Surface" = 'clay' AND "Score" = '4 : 0';

Question: What is the largest year located in zagreb, croatia?
SQL: SELECT MAX("Year") FROM "2-11233501-4" WHERE "Location" = 'zagreb, croatia';