Did M3 employ a character that M1 and M2 were directed by
SELECT count(*) WHERE {
?x0 a ns:fictional_universe.fictional_character .
?x0 ns:film.director.film M1 .
?x0 ns:film.director.film M2 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0
}