question: Did a Canadian film director that M1 and M2 were written by and edited by found M3 and M4
query: SELECT count(*) WHERE {
  ?x0 a ns:film.director .
  ?x0 ns:film.editor.film M1 .
  ?x0 ns:film.editor.film M2 .
  ?x0 ns:film.writer.film M1 .
  ?x0 ns:film.writer.film M2 .
  ?x0 ns:organization.organization_founder.organizations_founded M3 .
  ?x0 ns:organization.organization_founder.organizations_founded M4 .
  ?x0 ns:people.person.nationality ns:m.0d060g
  }