question: Did M1 direct M2 , M3 , and M4 , direct M5 and M6 , and executive produce M0 's prequel
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.sequel M0 .
  M1 ns:film.director.film M2 .
  M1 ns:film.director.film M3 .
  M1 ns:film.director.film M4 .
  M1 ns:film.director.film M5 .
  M1 ns:film.director.film M6 .
  M1 ns:film.producer.films_executive_produced ?x0
  }