question: Which sibling of M1 's male director executive produced M2 's sequel
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.producer.films_executive_produced ?x1 .
  ?x0 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 .
  ?x1 ns:film.film.prequel M2 .
  ?x2 ns:film.director.film M1 .
  ?x2 ns:people.person.gender ns:m.05zppz .
  FILTER ( ?x0 != ?x2 )
  }