Did M2 and M3 direct a film distributed by a person
SELECT count(*) WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor ?x1 .
?x1 a ns:people.person .
M2 ns:film.director.film ?x0 .
M3 ns:film.director.film ?x0
}