question: Which male director of M1 was M2 's sequel 's editor
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.director.film M1 .
  ?x0 ns:film.editor.film ?x1 .
  ?x0 ns:people.person.gender ns:m.05zppz .
  ?x1 ns:film.film.prequel M2
  }