question: Was M6 founded by a founder of M0 , M1 , M2 , and M3 and founded by M4 's female sibling
query: SELECT count(*) WHERE {
  ?x0 ns:organization.organization_founder.organizations_founded M0 .
  ?x0 ns:organization.organization_founder.organizations_founded M1 .
  ?x0 ns:organization.organization_founder.organizations_founded M2 .
  ?x0 ns:organization.organization_founder.organizations_founded M3 .
  ?x1 ns:people.person.gender ns:m.02zsn .
  ?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 M4 .
  FILTER ( ?x1 != M4 ) .
  M6 ns:organization.organization.founders ?x0 .
  M6 ns:organization.organization.founders ?x1
  }