CREATE TABLE table_204_771 (id DECIMAL, "rank" DECIMAL, "nation" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL)

what is the number of silver medals won by peru and ecuador combined ?
SELECT SUM("silver") FROM table_204_771 WHERE "nation" IN ('peru', 'ecuador')
SELECT SUM("silver") FROM "table_204_771" WHERE "nation" IN ('peru', 'ecuador')