Was a film director that a production company employed and M3 employed M1
SELECT count(*) WHERE {
?x0 a ns:film.production_company .
M1 a ns:film.director .
M1 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
M1 ns:people.person.employment_history/ns:business.employment_tenure.company M3
}