Were M2 and M4 edited by M3 , directed by a art director , and edited by a film director
SELECT count(*) WHERE {
?x0 a ns:film.director .
?x1 a ns:film.film_art_director .
M2 ns:film.film.directed_by ?x1 .
M2 ns:film.film.edited_by ?x0 .
M2 ns:film.film.edited_by M3 .
M4 ns:film.film.directed_by ?x1 .
M4 ns:film.film.edited_by ?x0 .
M4 ns:film.film.edited_by M3
}