CREATE TABLE table_12831 ("Rank" FLOAT, "Gold" FLOAT, "Silver" FLOAT, "Bronze" FLOAT, "Total" FLOAT)

How many silver medals were won by the participant(s) that had more than 12 gold medals and 11 bronze medals?
SELECT "Silver" FROM table_12831 WHERE "Gold" > '12' AND "Bronze" = '11'
SELECT "Silver" FROM "table_12831" WHERE "Bronze" = '11' AND "Gold" > '12'