question: Was M1 M0 's art director 's American actor
query: SELECT count(*) WHERE {
  ?x0 ns:film.film_art_director.films_art_directed M0 .
  M1 ns:film.actor.film/ns:film.performance.character ?x0 .
  M1 ns:people.person.nationality ns:m.09c7w0
  }