CREATE TABLE table_6445 ("Name" TEXT, "Pinnacle height" TEXT, "Structural type" TEXT, "Main use" TEXT, "Country" TEXT, "Town" TEXT)

Which Town has a Structural type of guyed mast and a Country of belgium?
SELECT "Town" FROM table_6445 WHERE "Structural type" = 'guyed mast' AND "Country" = 'belgium'
SELECT "Town" FROM "table_6445" WHERE "Country" = 'belgium' AND "Structural type" = 'guyed mast'