question: Was a sequel of M1 edited by M0 and written by a cinematographer and editor of M2
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.edited_by M0 .
  ?x0 ns:film.film.prequel M1 .
  ?x0 ns:film.film.written_by ?x1 .
  ?x1 ns:film.cinematographer.film M2 .
  ?x1 ns:film.editor.film M2
  }