question: Did M1 , M2 , and M3 executive produce and direct a film 's sequel
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.prequel ?x1 .
  ?x1 a ns:film.film .
  M1 ns:film.director.film ?x0 .
  M1 ns:film.producer.films_executive_produced ?x0 .
  M2 ns:film.director.film ?x0 .
  M2 ns:film.producer.films_executive_produced ?x0 .
  M3 ns:film.director.film ?x0 .
  M3 ns:film.producer.films_executive_produced ?x0
  }