question: Was a art director that a film was executive produced by and a film starred M1
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  ?x1 a ns:film.film .
  M1 a ns:film.film_art_director .
  M1 ns:film.actor.film/ns:film.performance.film ?x1 .
  M1 ns:film.producer.films_executive_produced ?x0
  }