CREATE TABLE table_203_716 (id DECIMAL, "rank" DECIMAL, "nation" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL)

what country is the only country with at least 20 gold medals ?
SELECT "nation" FROM table_203_716 WHERE "gold" >= 20
SELECT "nation" FROM "table_203_716" WHERE "gold" >= 20