CREATE TABLE table_55280 ("Film title" CLOB, "Director" CLOB, "Writer" CLOB, "Voiced character ( s ) " CLOB, "Producer/Executive Producer" CLOB, "Sound" CLOB)

Name the film that Lu directed.
SELECT "Film title" FROM table_55280 WHERE "Director" = 'lu'
SELECT "Film title" FROM "table_55280" WHERE "Director" = 'lu'