CREATE TABLE table_13836704_4 (airport VARCHAR(255), aircraft_movements_2009 VARCHAR(255), change_2008_09 VARCHAR(255))
what's the airport with aircraft movements 2009 being smaller than 238223.1659471435 and change 2008/09 being 0.5%
    
SQL: SELECT airport FROM table_13836704_4 WHERE aircraft_movements_2009 < 238223.1659471435 AND change_2008_09 = "0.5%"