Did M3 employ a writer of M0 and M1 and employ M2 's director
SELECT count(*) WHERE {
?x0 ns:film.writer.film M0 .
?x0 ns:film.writer.film M1 .
?x1 ns:film.director.film M2 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x1
}