Were M2 , M3 , and M4 employed by a film distributor that M1 was distributed by
SELECT count(*) WHERE {
?x0 a ns:film.film_distributor .
?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M1 .
M2 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
M3 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
M4 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0
}