CREATE TABLE table_39540 ("Wind Farm" TEXT, "Capacity  ( MW ) " FLOAT, "Turbines" FLOAT, "Turbine Vendor" TEXT, "Size  ( MW ) " TEXT, "County" TEXT)

What is the size of the windfarm in wexford that has more than 19 turbines and a vendor of Enercon?
SELECT "Size (MW)" FROM table_39540 WHERE "Turbines" > '19' AND "Turbine Vendor" = 'enercon' AND "County" = 'wexford'
SELECT "Size (MW)" FROM "table_39540" WHERE "County" = 'wexford' AND "Turbine Vendor" = 'enercon' AND "Turbines" > '19'