question: Was M2 's sequel written by a art director , executive produced by M0 , and written by M1
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.executive_produced_by M0 .
  ?x0 ns:film.film.prequel M2 .
  ?x0 ns:film.film.written_by ?x1 .
  ?x0 ns:film.film.written_by M1 .
  ?x1 a ns:film.film_art_director
  }