question: Did M2 and M7 star a Swedish director of M1 and star M3 , M4 , M5 , and M6
query: SELECT count(*) WHERE {
  ?x0 ns:film.director.film M1 .
  ?x0 ns:people.person.nationality ns:m.0d0vqn .
  M2 ns:film.film.starring/ns:film.performance.actor ?x0 .
  M2 ns:film.film.starring/ns:film.performance.actor M3 .
  M2 ns:film.film.starring/ns:film.performance.actor M4 .
  M2 ns:film.film.starring/ns:film.performance.actor M5 .
  M2 ns:film.film.starring/ns:film.performance.actor M6 .
  M7 ns:film.film.starring/ns:film.performance.actor ?x0 .
  M7 ns:film.film.starring/ns:film.performance.actor M3 .
  M7 ns:film.film.starring/ns:film.performance.actor M4 .
  M7 ns:film.film.starring/ns:film.performance.actor M5 .
  M7 ns:film.film.starring/ns:film.performance.actor M6
  }