Were M1 and M3 executive produced by a costume designer and executive produced by M2
SELECT count(*) WHERE {
?x0 a ns:film.film_costumer_designer .
M1 ns:film.film.executive_produced_by ?x0 .
M1 ns:film.film.executive_produced_by M2 .
M3 ns:film.film.executive_produced_by ?x0 .
M3 ns:film.film.executive_produced_by M2
}