question: Did a sequel of M0 star a film editor and star a screenwriter
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.prequel M0 .
  ?x0 ns:film.film.starring/ns:film.performance.actor ?x1 .
  ?x0 ns:film.film.starring/ns:film.performance.actor ?x2 .
  ?x1 a ns:film.editor .
  ?x2 a ns:film.writer
  }