CREATE TABLE table_50270 ("City" CLOB, "Country" CLOB, "IATA" CLOB, "ICAO" CLOB, "Airport" CLOB)

What is the IATA for San Francisco airport?
SELECT "IATA" FROM table_50270 WHERE "Airport" = 'san francisco airport'
SELECT "IATA" FROM "table_50270" WHERE "Airport" = 'san francisco airport'