Which film editor executive produced a film edited by M3 , M4 , M5 , and M6 and directed M1
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.editor .
?x0 ns:film.director.film M1 .
?x0 ns:film.producer.films_executive_produced ?x1 .
?x1 a ns:film.film .
?x1 ns:film.film.edited_by M3 .
?x1 ns:film.film.edited_by M4 .
?x1 ns:film.film.edited_by M5 .
?x1 ns:film.film.edited_by M6
}