Was a film producer founded by M1 and M2 and founded by M3 's sibling
SELECT count(*) WHERE {
?x0 a ns:film.producer .
?x0 ns:organization.organization.founders ?x1 .
?x0 ns:organization.organization.founders M1 .
?x0 ns:organization.organization.founders M2 .
?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 M3 .
FILTER ( ?x1 != M3 )
}