CREATE TABLE table_6996 ("Locomotive" TEXT, "Serial No" TEXT, "Entered service" TEXT, "Owner" TEXT, "Operator" TEXT, "Livery" TEXT, "Gauge" TEXT, "Status" TEXT)

What is the Serial number of the Locomotive that Entered Service in November 1984 and has an Owner of Chicago Freight Car Leasing Australia?
SELECT "Serial No" FROM table_6996 WHERE "Entered service" = 'november 1984' AND "Owner" = 'chicago freight car leasing australia'
SELECT "Serial No" FROM "table_6996" WHERE "Entered service" = 'november 1984' AND "Owner" = 'chicago freight car leasing australia'