question: Was M2 edited by a film 's director and directed by a actor
query: SELECT count(*) WHERE {
  ?x0 ns:film.director.film ?x1 .
  ?x1 a ns:film.film .
  ?x2 a ns:film.actor .
  M2 ns:film.film.directed_by ?x2 .
  M2 ns:film.film.edited_by ?x0
  }