Who was a costume designer and director of M1 and M2
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:film.director.film M1 .
?x0 ns:film.director.film M2 .
?x0 ns:film.film_costumer_designer.costume_design_for_film M1 .
?x0 ns:film.film_costumer_designer.costume_design_for_film M2
}