Table: airlines_korea
Columns: airline
icao
iata
callsign
commenced_operations

Question: What airline has a IATA of BX?
SQL: SELECT "airline" FROM airlines_korea WHERE "iata" = 'bx'

Question: What is the ICAO for Asiana Airlines?
SQL: SELECT "icao" FROM airlines_korea WHERE "airline" = 'asiana airlines'

Question: What is the commenced operation where the ICAO is KAL?
SQL: SELECT "commenced_operations" FROM airlines_korea WHERE "icao" = 'kal'

Question: What is the ICAO for Air Busan?
SQL: SELECT "icao" FROM airlines_korea WHERE "callsign" = 'air busan'

Question: What is the callsign where the ICAO is AAR?
SQL: SELECT "callsign" FROM airlines_korea WHERE "icao" = 'aar'