CREATE TABLE table_56475 ("Navy" TEXT, "Name" TEXT, "Pennant" TEXT, "Commissioned" FLOAT, "Home port" TEXT)

What is the navy for middleton with a home port of portsmouth after 1983?
SELECT "Navy" FROM table_56475 WHERE "Home port" = 'portsmouth' AND "Commissioned" > '1983' AND "Name" = 'middleton'
SELECT "Navy" FROM "table_56475" WHERE "Commissioned" > '1983' AND "Home port" = 'portsmouth' AND "Name" = 'middleton'