Was a costume designer and editor of M1 and M2 a film producer
SELECT count(*) WHERE {
?x0 a ns:film.producer .
?x0 ns:film.editor.film M1 .
?x0 ns:film.editor.film M2 .
?x0 ns:film.film_costumer_designer.costume_design_for_film M1 .
?x0 ns:film.film_costumer_designer.costume_design_for_film M2
}