CREATE TABLE table_204_12 (id DECIMAL, "area served" TEXT, "city of license" TEXT, "vc" DECIMAL, "rf" DECIMAL, "callsign" TEXT, "network" TEXT, "notes" TEXT)

does cbs serve at least 5 areas ?
SELECT (SELECT COUNT(DISTINCT "area served") FROM table_204_12) >= 5
SELECT (SELECT COUNT(DISTINCT "area served") FROM "table_204_12") >= 5