CREATE TABLE table_72198 ("Target" TEXT, "Target Code  ( Allied ) " TEXT, "Luftwaffe unit  ( wing ) " TEXT, "Allied forces" TEXT, "Effect on Allied Squadrons  ( according to official figures ) " TEXT)

What is the allied target code of the group that targetted ghent/sint-denijs-westrem?
SELECT "Target Code (Allied)" FROM table_72198 WHERE "Target" = 'Ghent/Sint-Denijs-Westrem'
SELECT "Target Code (Allied)" FROM "table_72198" WHERE "Target" = 'Ghent/Sint-Denijs-Westrem'