question: Was M1 founded by M2 , founded by M0 's producer 's sibling , founded by M3 , and founded by M4
query: SELECT count(*) WHERE {
  ?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 ?x1 .
  ?x1 ns:film.producer.film|ns:film.production_company.films M0 .
  FILTER ( ?x0 != ?x1 ) .
  M1 ns:organization.organization.founders ?x0 .
  M1 ns:organization.organization.founders M2 .
  M1 ns:organization.organization.founders M3 .
  M1 ns:organization.organization.founders M4
  }