question: Was M2 a company 's founder 's British sibling 's employer
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.nationality ns:m.07ssc .
  ?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:organization.organization_founder.organizations_founded ?x2 .
  ?x2 a ns:business.employer .
  FILTER ( ?x0 != ?x1 ) .
  M2 ns:business.employer.employees/ns:business.employment_tenure.person ?x0
  }