question: Were M1 and M2 written by M0 's sequel 's director , editor , and cinematographer
query: SELECT count(*) WHERE {
  ?x0 ns:film.cinematographer.film ?x1 .
  ?x0 ns:film.director.film ?x1 .
  ?x0 ns:film.editor.film ?x1 .
  ?x1 ns:film.film.prequel M0 .
  M1 ns:film.film.written_by ?x0 .
  M2 ns:film.film.written_by ?x0
  }