question: Was a film executive produced by M1 's director and art director
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.executive_produced_by ?x1 .
  ?x1 ns:film.director.film M1 .
  ?x1 ns:film.film_art_director.films_art_directed M1
  }