question: Which cinematographer edited M1 and M2 and edited a film
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.cinematographer .
  ?x0 ns:film.editor.film ?x1 .
  ?x0 ns:film.editor.film M1 .
  ?x0 ns:film.editor.film M2 .
  ?x1 a ns:film.film
  }