What's the D ERP in San Martin Texmelucan, Puebla?
CREATE TABLE "station_repeaters" (
  "callsign" text,
  "network" text,
  "city_of_license" text,
  "d_erp" text,
  "owner_operator" text
);
SELECT "d_erp" FROM "station_repeaters" WHERE "city_of_license"='san martin texmelucan, puebla';