CREATE TABLE table_51114 ("Rank" TEXT, "Nation" TEXT, "Gold" FLOAT, "Silver" FLOAT, "Bronze" FLOAT, "Total" FLOAT)

Name the Silver that has a Total smaller than 2, and a Nation of south korea?
SELECT AVG("Silver") FROM table_51114 WHERE "Total" < '2' AND "Nation" = 'south korea'
SELECT AVG("Silver") FROM "table_51114" WHERE "Nation" = 'south korea' AND "Total" < '2'