Was M1 a male Mexican art director whose employer employed M0
SELECT count(*) WHERE {
?x0 ns:business.employer.employees/ns:business.employment_tenure.person M0 .
M1 a ns:film.film_art_director .
M1 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
M1 ns:people.person.gender ns:m.05zppz .
M1 ns:people.person.nationality ns:m.0b90_r
}