CREATE TABLE table_50271 ("City" TEXT, "Country" TEXT, "IATA" TEXT, "ICAO" TEXT, "Airport" TEXT)

Which city has an ICAO of Oejn?
SELECT "City" FROM table_50271 WHERE "ICAO" = 'oejn'
SELECT "City" FROM "table_50271" WHERE "ICAO" = 'oejn'