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

Question: What is the frequency of the station that was launched on 21 August 1994?
SQL: SELECT "frequency" FROM "stations" WHERE "launched"='21 august 1994';

Question: What is the launched date of the station in cora huichol tepehuano nahuatl language?
SQL: SELECT "launched" FROM "stations" WHERE "languages"='cora huichol tepehuano nahuatl';

Question: Where is the station with a coverage of yucatán quintana roo campeche transmitting from?
SQL: SELECT "transmitting_from" FROM "stations" WHERE "coverage"='yucatán quintana roo campeche';

Question: What is the frequency of the station with a coverage of oaxaca guerrero puebla?
SQL: SELECT "frequency" FROM "stations" WHERE "coverage"='oaxaca guerrero puebla';

Question: Where is the station that was launched on 17 July 1997 transmitting from?
SQL: SELECT "transmitting_from" FROM "stations" WHERE "launched"='17 july 1997';

Question: What is the coverage of the station that was launched on 22 January 1996?
SQL: SELECT "coverage" FROM "stations" WHERE "launched"='22 january 1996';