CREATE TABLE table_63044 ("Rank" FLOAT, "Nation" TEXT, "Gold" FLOAT, "Silver" FLOAT, "Bronze" FLOAT, "Total" FLOAT)

What is the Average for Silver medals that have more than 17 Golds?
SELECT AVG("Silver") FROM table_63044 WHERE "Gold" > '17'
SELECT AVG("Silver") FROM "table_63044" WHERE "Gold" > '17'