Were M2 and M4 edited by M3 and directed by a Mexican art director 's parent
SELECT count(*) WHERE {
?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x1 .
?x1 a ns:film.film_art_director .
?x1 ns:people.person.nationality ns:m.0b90_r .
M2 ns:film.film.directed_by ?x0 .
M2 ns:film.film.edited_by M3 .
M4 ns:film.film.directed_by ?x0 .
M4 ns:film.film.edited_by M3
}