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