Was a art director that M2 , M3 , M4 , M5 , and M6 were executive produced by M0
SELECT count(*) WHERE {
M0 a ns:film.film_art_director .
M0 ns:film.producer.films_executive_produced M2 .
M0 ns:film.producer.films_executive_produced M3 .
M0 ns:film.producer.films_executive_produced M4 .
M0 ns:film.producer.films_executive_produced M5 .
M0 ns:film.producer.films_executive_produced M6
}