CREATE TABLE table_42512 ("Rank" TEXT, "Nation" TEXT, "Gold" FLOAT, "Silver" FLOAT, "Bronze" FLOAT, "Total" FLOAT)

What is the sum of the gold medals of the total nation, which has more than 19 silver medals?
SELECT SUM("Gold") FROM table_42512 WHERE "Nation" = 'total' AND "Silver" > '19'
SELECT SUM("Gold") FROM "table_42512" WHERE "Nation" = 'total' AND "Silver" > '19'