question: What art director was a character 's Mexican actor
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.film_art_director .
  ?x0 ns:film.actor.film/ns:film.performance.character ?x1 .
  ?x0 ns:people.person.nationality ns:m.0b90_r .
  ?x1 a ns:fictional_universe.fictional_character
  }