CREATE TABLE table_2800 ("Club" TEXT, "Location" TEXT, "Manager" TEXT, "Stadium" TEXT, "Capacity" FLOAT, "Team captain" TEXT)

Who's the captain of the team whose stadium is Gradski Stadion?
SELECT "Team captain" FROM table_2800 WHERE "Stadium" = 'Gradski Stadion'
SELECT "Team captain" FROM "table_2800" WHERE "Stadium" = 'Gradski Stadion'