question: What did M0 and M1 write and a director of M2 and M3 edit
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film.edited_by ?x1 .
  ?x0 ns:film.film.written_by M0 .
  ?x0 ns:film.film.written_by M1 .
  ?x1 ns:film.director.film M2 .
  ?x1 ns:film.director.film M3
  }