question: Was M0 's sequel directed by a film director and directed by M1 , M2 , and M3
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.directed_by ?x1 .
  ?x0 ns:film.film.directed_by M1 .
  ?x0 ns:film.film.directed_by M2 .
  ?x0 ns:film.film.directed_by M3 .
  ?x0 ns:film.film.prequel M0 .
  ?x1 a ns:film.director
  }