CREATE TABLE table_54503 ("Tournament" TEXT, "Date" TEXT, "City" TEXT, "Country" TEXT, "Surface" TEXT, "Singles champions" TEXT)

On what Surface will the Venezuela F5 Futures in Caracas be played?
SELECT "Surface" FROM table_54503 WHERE "City" = 'caracas' AND "Tournament" = 'venezuela f5 futures'
SELECT "Surface" FROM "table_54503" WHERE "City" = 'caracas' AND "Tournament" = 'venezuela f5 futures'