CREATE TABLE "references" (
  "city" text,
  "country" text,
  "iata" text,
  "icao" text,
  "airport" text
);

Question: What is ICAO, when Airport is "Sibulan Airport"?
SQL: SELECT "icao" FROM "references" WHERE "airport"='sibulan airport';

Question: What is ICAO, when IATA is "HKG"?
SQL: SELECT "icao" FROM "references" WHERE "iata"='hkg';

Question: What is IATA, when ICAO is "VHHH"?
SQL: SELECT "iata" FROM "references" WHERE "icao"='vhhh';

Question: What is City, when IATA is "LAO"?
SQL: SELECT "city" FROM "references" WHERE "iata"='lao';

Question: What is Country, when City is "Zamboanga"?
SQL: SELECT "country" FROM "references" WHERE "city"='zamboanga';