Was M3 a film distributor whose employee directed M2 and wrote M0 and M1
SELECT count(*) WHERE {
?x0 ns:film.director.film M2 .
?x0 ns:film.writer.film M0 .
?x0 ns:film.writer.film M1 .
M3 a ns:film.film_distributor .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0
}