Was a person employed by M1 and employed by M2 M4 's male art director
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x0 ns:film.film_art_director.films_art_directed M4 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
?x0 ns:people.person.gender ns:m.05zppz
}