question: Was M0 a Canadian film editor that M2 was produced by and edited by
query: SELECT count(*) WHERE {
  M0 a ns:film.editor .
  M0 ns:film.editor.film M2 .
  M0 ns:film.producer.film|ns:film.production_company.films M2 .
  M0 ns:people.person.nationality ns:m.0d060g
  }