CREATE TABLE table_203_707 (id DECIMAL, "rank" DECIMAL, "npc" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL)

how many silver medals did poland win ?
SELECT "silver" FROM table_203_707 WHERE "npc" = 'poland'
SELECT "silver" FROM "table_203_707" WHERE "npc" = 'poland'