question: Which Swedish film director directed M1 and M2 and directed M3
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.director.film M1 .
  ?x0 ns:film.director.film M2 .
  ?x0 ns:film.director.film M3 .
  ?x0 ns:people.person.nationality ns:m.0d0vqn
  }