CREATE TABLE table_16571 ("Character" TEXT, "Portrayed by" TEXT, "First appearance" TEXT, "Last appearance" TEXT, "Duration" TEXT, "Episodes" TEXT)

How many episodes did actress Vanessa Ferlito appear in?
SELECT "Episodes" FROM table_16571 WHERE "Portrayed by" = 'Vanessa Ferlito'
SELECT "Episodes" FROM "table_16571" WHERE "Portrayed by" = 'Vanessa Ferlito'