question: Was a star of M1 employed by M0 , employed by M2 's country of nationality , and employed by a production company
query: SELECT count(*) WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.film M1 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x2 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M0 .
  ?x1 ^ns:people.person.nationality M2 .
  ?x2 a ns:film.production_company
  }