CREATE TABLE table_41852 ("City" TEXT, "Country" TEXT, "IATA" TEXT, "ICAO" TEXT, "Airport" TEXT)

What is the ICAO when the IATA is ist?
SELECT "ICAO" FROM table_41852 WHERE "IATA" = 'ist'
SELECT "ICAO" FROM "table_41852" WHERE "IATA" = 'ist'