question: Did M3 executive produce a film whose art director and director wrote M1 and wrote M2
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.directed_by ?x1 .
  ?x0 ns:film.film.film_art_direction_by ?x1 .
  ?x1 ns:film.writer.film M1 .
  ?x1 ns:film.writer.film M2 .
  M3 ns:film.producer.films_executive_produced ?x0
  }