CREATE TABLE table_40826 ("AIRLINE" CLOB, "ICAO" CLOB, "IATA" CLOB, "CALLSIGN" CLOB, "COMMENCED OPERATIONS" CLOB)

What is the ICAO for Air Busan?
SELECT "ICAO" FROM table_40826 WHERE "CALLSIGN" = 'air busan'
SELECT "ICAO" FROM "table_40826" WHERE "CALLSIGN" = 'air busan'