Were M1 and M4 produced by a art director , executive produced by M2 , and executive produced by M3
SELECT count(*) WHERE {
?x0 a ns:film.film_art_director .
M1 ns:film.film.executive_produced_by M2 .
M1 ns:film.film.executive_produced_by M3 .
M1 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M4 ns:film.film.executive_produced_by M2 .
M4 ns:film.film.executive_produced_by M3 .
M4 ns:film.film.produced_by|ns:film.film.production_companies ?x0
}