Where are the broadcasting companys with the callsign DWRH located?
CREATE TABLE "dzrh_nationwide" (
  "branding" text,
  "callsign" text,
  "frequency" text,
  "power_k_w" text,
  "station_type" text,
  "location" text
);
SELECT "location" FROM "dzrh_nationwide" WHERE "callsign"='DWRH';