question: Was a film that was edited by M2 and M3 and was directed by M4 M0
query: SELECT count(*) WHERE {
  M0 a ns:film.film .
  M0 ns:film.film.directed_by M4 .
  M0 ns:film.film.edited_by M2 .
  M0 ns:film.film.edited_by M3
  }