Did a female person direct M2 and M3 and direct M4
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x0 ns:film.director.film M2 .
?x0 ns:film.director.film M3 .
?x0 ns:film.director.film M4 .
?x0 ns:people.person.gender ns:m.02zsn
}