What is the power in KW that has a station type of relay and a callsign of DXCL-TV?
CREATE TABLE "ptv_stations_nationwide" (
  "branding" text,
  "callsign" text,
  "ch_num" text,
  "power_k_w" text,
  "station_type" text,
  "location_transmitter_site" text
);
SELECT "power_k_w" FROM "ptv_stations_nationwide" WHERE "station_type"='Relay' AND "callsign"='DXCL-TV';