question: What sibling of M0 was employed by M1 and employed by a distributor of M2 and M3
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
  ?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 M0 .
  ?x1 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M2 .
  ?x1 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M3 .
  FILTER ( ?x0 != M0 )
  }