question: Was M2 's sequel 's star M1 's French star
query: SELECT count(*) WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.film ?x1 .
  ?x0 ns:film.actor.film/ns:film.performance.film M1 .
  ?x0 ns:people.person.nationality ns:m.0f8l9c .
  ?x1 ns:film.film.prequel M2
  }