Did M3 employ a cinematographer and employ a costume designer of M1 and M2
SELECT count(*) WHERE {
?x0 a ns:film.cinematographer .
?x1 ns:film.film_costumer_designer.costume_design_for_film M1 .
?x1 ns:film.film_costumer_designer.costume_design_for_film M2 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x1
}