question: Did a Japanese actor of M1 and M2 play M3
query: SELECT count(*) WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.character M1 .
  ?x0 ns:film.actor.film/ns:film.performance.character M2 .
  ?x0 ns:film.actor.film/ns:film.performance.character M3 .
  ?x0 ns:people.person.nationality ns:m.03_3d
  }