CREATE TABLE "stations" (
  "call_sign" text,
  "launched" text,
  "transmitting_from" text,
  "coverage" text,
  "languages" text,
  "frequency" text
);

Question: What frequency does Chihuahua Sinaloa Durango cover?
SQL: SELECT "frequency" FROM "stations" WHERE "coverage"='Chihuahua Sinaloa Durango';

Question: How many times does the call sign XEZV appear?
SQL: SELECT COUNT("transmitting_from") FROM "stations" WHERE "call_sign"='XEZV';

Question: What languages are spoken when call sign XEJAM is used?
SQL: SELECT "languages" FROM "stations" WHERE "call_sign"='XEJAM';