What's the frequency of the call sign DYFR with 10KW of power?
CREATE TABLE "febc_stations_in_the_philippines" (
  "branding" text,
  "call_sign" text,
  "frequency" text,
  "power_kw" text,
  "location" text
);
SELECT "frequency" FROM "febc_stations_in_the_philippines" WHERE "power_kw"='10kw' AND "call_sign"='dyfr';