question: Was a actor a German director of M2 , M3 , M4 , M5 , and M6
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?x0 ns:film.director.film M2 .
  ?x0 ns:film.director.film M3 .
  ?x0 ns:film.director.film M4 .
  ?x0 ns:film.director.film M5 .
  ?x0 ns:film.director.film M6 .
  ?x0 ns:people.person.nationality ns:m.0345h
  }