question: Did M1 and M2 found a cinematographer 's sibling 's employer
query: SELECT count(*) WHERE {
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?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 a ns:film.cinematographer .
  FILTER ( ?x1 != ?x2 ) .
  M1 ns:organization.organization_founder.organizations_founded ?x0 .
  M2 ns:organization.organization_founder.organizations_founded ?x0
  }