question: Was a company that M0 's sibling was employed by and founded M1
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 M0 .
  FILTER ( ?x0 != M0 ) .
  M1 a ns:business.employer .
  M1 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
  M1 ns:organization.organization.founders ?x0
  }