CREATE TABLE table_55283 ("Film title" CLOB, "Director" CLOB, "Writer" CLOB, "Voiced character ( s ) " CLOB, "Producer/Executive Producer" CLOB, "Sound" CLOB)

Who was the sound producer that worked under Executive Producer JL?
SELECT "Sound" FROM table_55283 WHERE "Producer/Executive Producer" = 'jl'
SELECT "Sound" FROM "table_55283" WHERE "Producer/Executive Producer" = 'jl'