question: Which film was written by M2 , executive produced by M1 , and written by M3 's art director
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.executive_produced_by M1 .
  ?x0 ns:film.film.written_by ?x1 .
  ?x0 ns:film.film.written_by M2 .
  ?x1 ns:film.film_art_director.films_art_directed M3
  }