question: Did a actor direct M1 , M2 , M3 , M4 , and M5 and direct M6 and M7
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?x0 ns:film.director.film M1 .
  ?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:film.director.film M7
  }