Were M1 and M3 founded by M2 and founded by a film director
SELECT count(*) WHERE {
?x0 a ns:film.director .
M1 ns:organization.organization.founders ?x0 .
M1 ns:organization.organization.founders M2 .
M3 ns:organization.organization.founders ?x0 .
M3 ns:organization.organization.founders M2
}