CREATE TABLE "long_range_am_stations" (
  "frequency" real,
  "callsign" text,
  "brand" text,
  "city_of_license" text,
  "website" text,
  "webcast" text
);

Question: Which Frequency has a Webcast of •, and a Callsign of xemr?
SQL: SELECT AVG("frequency") FROM "long_range_am_stations" WHERE "webcast"='•' AND "callsign"='xemr';

Question: Which Website has a Frequency smaller than 760 and a Callsign of kkyx?
SQL: SELECT "website" FROM "long_range_am_stations" WHERE "frequency"<760 AND "callsign"='kkyx';

Question: Which Webcast has a Callsign of kgbt?
SQL: SELECT "webcast" FROM "long_range_am_stations" WHERE "callsign"='kgbt';

Question: Which Frequency has a Website of •, and a Webcast of •in san antonio?
SQL: SELECT AVG("frequency") FROM "long_range_am_stations" WHERE "website"='•' AND "webcast"='•' AND "city_of_license"='san antonio';