question: Did a screenwriter executive produce a film that was directed by a actor and starred M2 , M3 , and M4
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:film.producer.films_executive_produced ?x1 .
  ?x1 a ns:film.film .
  ?x1 ns:film.film.directed_by ?x2 .
  ?x1 ns:film.film.starring/ns:film.performance.actor M2 .
  ?x1 ns:film.film.starring/ns:film.performance.actor M3 .
  ?x1 ns:film.film.starring/ns:film.performance.actor M4 .
  ?x2 a ns:film.actor
  }