Were M2 and M4 executive produced by a art director , executive produced by M3 , and directed by a executive producer of M1
SELECT count(*) WHERE {
?x0 a ns:film.film_art_director .
?x1 ns:film.producer.films_executive_produced M1 .
M2 ns:film.film.directed_by ?x1 .
M2 ns:film.film.executive_produced_by ?x0 .
M2 ns:film.film.executive_produced_by M3 .
M4 ns:film.film.directed_by ?x1 .
M4 ns:film.film.executive_produced_by ?x0 .
M4 ns:film.film.executive_produced_by M3
}