question: Which director of M0 and M1 was employed by a country of nationality of M2
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.director.film M0 .
  ?x0 ns:film.director.film M1 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
  ?x1 ^ns:people.person.nationality M2
  }