question: Was M1 's parent M2 's Mexican director
query: SELECT count(*) WHERE {
  ?x0 ns:film.director.film M2 .
  ?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child M1 .
  ?x0 ns:people.person.nationality ns:m.0b90_r
  }