Was M2 directed by M1 's writer , edited by a art director , and edited by M3 and M4
SELECT count(*) WHERE {
?x0 a ns:film.film_art_director .
?x1 ns:film.writer.film M1 .
M2 ns:film.film.directed_by ?x1 .
M2 ns:film.film.edited_by ?x0 .
M2 ns:film.film.edited_by M3 .
M2 ns:film.film.edited_by M4
}