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