CREATE TABLE table_50412 ("Branding" CLOB, "Callsign" CLOB, "Frequency" CLOB, "Power  ( kW ) " CLOB, "Location" CLOB)

Which frequency has 40kw power?
SELECT "Frequency" FROM table_50412 WHERE "Power (kW)" = '40kw'
SELECT "Frequency" FROM "table_50412" WHERE "Power (kW)" = '40kw'