question: What was M2 's male art director 's Mexican sibling 's gender
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ^ns:people.person.gender ?x1 .
  ?x1 ns:people.person.nationality ns:m.0b90_r .
  ?x1 ns:people.person.sibling_s/ns:people.sibling_relationship.sibling|ns:fictional_universe.fictional_character.siblings/ns:fictional_universe.sibling_relationship_of_fictional_characters.siblings ?x2 .
  ?x2 ns:film.film_art_director.films_art_directed M2 .
  ?x2 ns:people.person.gender ns:m.05zppz .
  FILTER ( ?x1 != ?x2 )
  }