question: What was executive produced by a Canadian cinematographer of M4 and edited by M0 , M1 , and M2
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film.edited_by M0 .
  ?x0 ns:film.film.edited_by M1 .
  ?x0 ns:film.film.edited_by M2 .
  ?x0 ns:film.film.executive_produced_by ?x1 .
  ?x1 ns:film.cinematographer.film M4 .
  ?x1 ns:people.person.nationality ns:m.0d060g
  }