question: Did M1 executive produce a sequel of M0 , write M2 , and executive produce M3
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.prequel M0 .
  M1 ns:film.producer.films_executive_produced ?x0 .
  M1 ns:film.producer.films_executive_produced M3 .
  M1 ns:film.writer.film M2
  }