question: What Mexican parent of a editor of M2 edited a film
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.editor.film ?x1 .
  ?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x2 .
  ?x0 ns:people.person.nationality ns:m.0b90_r .
  ?x1 a ns:film.film .
  ?x2 ns:film.editor.film M2
  }