question: Who was a Canadian film editor that M3 's director and producer married
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.editor .
  ?x0 a ns:people.person .
  ?x0 ns:people.person.nationality ns:m.0d060g .
  ?x0 ns:people.person.spouse_s/ns:people.marriage.spouse|ns:fictional_universe.fictional_character.married_to/ns:fictional_universe.marriage_of_fictional_characters.spouses ?x1 .
  ?x1 ns:film.director.film M3 .
  ?x1 ns:film.producer.film|ns:film.production_company.films M3 .
  FILTER ( ?x0 != ?x1 )
  }