Was M1 's American art director a art director of M2 and M3
SELECT count(*) WHERE {
?x0 ns:film.film_art_director.films_art_directed M1 .
?x0 ns:film.film_art_director.films_art_directed M2 .
?x0 ns:film.film_art_director.films_art_directed M3 .
?x0 ns:people.person.nationality ns:m.09c7w0
}