CREATE TABLE table_14436 ("Date" TEXT, "Label" TEXT, "Region" TEXT, "Format" TEXT, "Catalog" TEXT)

Where was the 12' maxi in September 1990?
SELECT "Region" FROM table_14436 WHERE "Format" = '12" maxi' AND "Date" = 'september 1990'
SELECT "Region" FROM "table_14436" WHERE "Date" = 'september 1990' AND "Format" = '12" maxi'