question: Was M1 produced by M2 and produced by a art director
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film_art_director .
  M1 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
  M1 ns:film.film.produced_by|ns:film.film.production_companies M2
  }