CREATE TABLE table_203_747 (id DECIMAL, "rank" DECIMAL, "nation" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL)

which countries have the same number of silver medals in the asian youth games as north korea ?
SELECT "nation" FROM table_203_747 WHERE "nation" <> 'north korea' AND "silver" = (SELECT "silver" FROM table_203_747 WHERE "nation" = 'north korea')
SELECT "nation" FROM "table_203_747" WHERE "nation" <> 'north korea' AND "silver" = (SELECT "silver" FROM "table_203_747" WHERE "nation" = 'north korea')