Were M2 and M3 written by a film producer and executive produced by a costume designer
SELECT count(*) WHERE {
?x0 a ns:film.film_costumer_designer .
?x1 a ns:film.producer .
M2 ns:film.film.executive_produced_by ?x0 .
M2 ns:film.film.written_by ?x1 .
M3 ns:film.film.executive_produced_by ?x0 .
M3 ns:film.film.written_by ?x1
}