Was a art director that M2 , M3 , and M4 starred a film director
SELECT count(*) WHERE {
?x0 a ns:film.director .
?x0 a ns:film.film_art_director .
?x0 ns:film.actor.film/ns:film.performance.film M2 .
?x0 ns:film.actor.film/ns:film.performance.film M3 .
?x0 ns:film.actor.film/ns:film.performance.film M4
}