question: Did M1 write M2 , M3 , M4 , and M5 and executive produce a film 's prequel 's sequel
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.prequel ?x1 .
  ?x1 ns:film.film.sequel ?x2 .
  ?x2 a ns:film.film .
  M1 ns:film.producer.films_executive_produced ?x0 .
  M1 ns:film.writer.film M2 .
  M1 ns:film.writer.film M3 .
  M1 ns:film.writer.film M4 .
  M1 ns:film.writer.film M5
  }