question: Which Canadian actor that M1 was edited by and M2 was written by founded M3
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.actor .
  ?x0 ns:film.editor.film M1 .
  ?x0 ns:film.writer.film M2 .
  ?x0 ns:organization.organization_founder.organizations_founded M3 .
  ?x0 ns:people.person.nationality ns:m.0d060g
  }