Did a costume designer executive produce M1 and M2 and executive produce M3 , M4 , M5 , and M6
SELECT count(*) WHERE {
?x0 a ns:film.film_costumer_designer .
?x0 ns:film.producer.films_executive_produced M1 .
?x0 ns:film.producer.films_executive_produced M2 .
?x0 ns:film.producer.films_executive_produced M3 .
?x0 ns:film.producer.films_executive_produced M4 .
?x0 ns:film.producer.films_executive_produced M5 .
?x0 ns:film.producer.films_executive_produced M6
}