question: Was M1 a film director that edited , wrote , and executive produced M0 's prequel
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.sequel M0 .
  M1 a ns:film.director .
  M1 ns:film.editor.film ?x0 .
  M1 ns:film.producer.films_executive_produced ?x0 .
  M1 ns:film.writer.film ?x0
  }