question: Which film producer was M1 's star , art director , and editor
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.producer .
  ?x0 ns:film.actor.film/ns:film.performance.film M1 .
  ?x0 ns:film.editor.film M1 .
  ?x0 ns:film.film_art_director.films_art_directed M1
  }