question: What director and editor of M0 directed a prequel of M1
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.director.film ?x1 .
  ?x0 ns:film.director.film M0 .
  ?x0 ns:film.editor.film M0 .
  ?x1 ns:film.film.sequel M1
  }