question: Was M1 a film 's American male actor
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  M1 ns:film.actor.film/ns:film.performance.character ?x0 .
  M1 ns:people.person.gender ns:m.05zppz .
  M1 ns:people.person.nationality ns:m.09c7w0
  }