question: Was M2 edited by a art director that M1 was edited by and starred
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film_art_director .
  ?x0 ns:film.actor.film/ns:film.performance.film M1 .
  ?x0 ns:film.editor.film M1 .
  M2 ns:film.film.edited_by ?x0
  }