question: What did M1 's sibling write , a spouse of M2 's employee produce , and M0 executive produce
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film.executive_produced_by M0 .
  ?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
  ?x0 ns:film.film.written_by ?x2 .
  ?x1 ns:people.person.spouse_s/ns:people.marriage.spouse|ns:fictional_universe.fictional_character.married_to/ns:fictional_universe.marriage_of_fictional_characters.spouses ?x3 .
  ?x2 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 M1 .
  ?x3 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
  FILTER ( ?x1 != ?x3 ) .
  FILTER ( ?x2 != M1 )
  }