CREATE TABLE table_18791 ("City of license /Market" TEXT, "Station" TEXT, "Channel TV  (  DT  ) " TEXT, "Owned since" TEXT, "Primary affiliation" TEXT)

What city has channel tv (dt) 25 (31)?
SELECT "City of license /Market" FROM table_18791 WHERE "Channel TV ( DT )" = '25 (31)'
SELECT "City of license /Market" FROM "table_18791" WHERE "Channel TV ( DT )" = '25 (31)'