question: What art director was a film editor that M2 and M3 were edited by and starred
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.editor .
  ?x0 a ns:film.film_art_director .
  ?x0 ns:film.actor.film/ns:film.performance.film M2 .
  ?x0 ns:film.actor.film/ns:film.performance.film M3 .
  ?x0 ns:film.editor.film M2 .
  ?x0 ns:film.editor.film M3
  }