CREATE TABLE table_40153 ("Branding" TEXT, "Callsign" TEXT, "Frequency" TEXT, "Power  ( kW ) " TEXT, "Coverage" TEXT)

What is the frequency for the 10kw station with DXEZ as its callsign?
SELECT "Frequency" FROM table_40153 WHERE "Power (kW)" = '10kw' AND "Callsign" = 'dxez'
SELECT "Frequency" FROM "table_40153" WHERE "Callsign" = 'dxez' AND "Power (kW)" = '10kw'