Did a film star M1 and star M2 's costume designer
SELECT count(*) WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.starring/ns:film.performance.actor ?x1 .
?x0 ns:film.film.starring/ns:film.performance.actor M1 .
?x1 ns:film.film_costumer_designer.costume_design_for_film M2
}