Was M3 distributed by a film distributor that M1 and M2 founded
SELECT count(*) WHERE {
?x0 a ns:film.film_distributor .
?x0 ns:organization.organization.founders M1 .
?x0 ns:organization.organization.founders M2 .
M3 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor ?x0
}