question: Was M2 directed by M1 's American star and executive produced by M3 and M4
query: SELECT count(*) WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.film M1 .
  ?x0 ns:people.person.nationality ns:m.09c7w0 .
  M2 ns:film.film.directed_by ?x0 .
  M2 ns:film.film.executive_produced_by M3 .
  M2 ns:film.film.executive_produced_by M4
  }