CREATE TABLE table_204_725 (id DECIMAL, "rank" DECIMAL, "nation" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL)

tell me the number of silver medals won by saudi arabia .
SELECT "silver" FROM table_204_725 WHERE "nation" = 'saudi arabia'
SELECT "silver" FROM "table_204_725" WHERE "nation" = 'saudi arabia'