question: Was a actor of M2 and M3 M1 's French star
query: SELECT count(*) WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.character M2 .
  ?x0 ns:film.actor.film/ns:film.performance.character M3 .
  ?x0 ns:film.actor.film/ns:film.performance.film M1 .
  ?x0 ns:people.person.nationality ns:m.0f8l9c
  }