Did M3 employ a art director that M2 employed and was founded by and employ M0 's sibling
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 .
?x1 a ns:film.film_art_director .
?x1 ns:organization.organization_founder.organizations_founded M2 .
?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
FILTER ( ?x0 != M0 ) .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x1
}