question: Which production company employed and was founded by a sibling of a founder of M1 , M2 , M3 , M4 , and M5
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.production_company .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
  ?x0 ns:organization.organization.founders ?x1 .
  ?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:organization.organization_founder.organizations_founded M1 .
  ?x2 ns:organization.organization_founder.organizations_founded M2 .
  ?x2 ns:organization.organization_founder.organizations_founded M3 .
  ?x2 ns:organization.organization_founder.organizations_founded M4 .
  ?x2 ns:organization.organization_founder.organizations_founded M5 .
  FILTER ( ?x1 != ?x2 )
  }