question: Which film was written by a actor , written by M1 , and edited by M2 , M3 , and M4
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.edited_by M2 .
  ?x0 ns:film.film.edited_by M3 .
  ?x0 ns:film.film.edited_by M4 .
  ?x0 ns:film.film.written_by ?x1 .
  ?x0 ns:film.film.written_by M1 .
  ?x1 a ns:film.actor
  }