question: Were M4 and M6 executive produced by M5 and directed by a art director that played M1 , M2 , and M3
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film_art_director .
  ?x0 ns:film.actor.film/ns:film.performance.character M1 .
  ?x0 ns:film.actor.film/ns:film.performance.character M2 .
  ?x0 ns:film.actor.film/ns:film.performance.character M3 .
  M4 ns:film.film.directed_by ?x0 .
  M4 ns:film.film.executive_produced_by M5 .
  M6 ns:film.film.directed_by ?x0 .
  M6 ns:film.film.executive_produced_by M5
  }