Was M3 a film whose Mexican director and editor produced M1 and M2
SELECT count(*) WHERE {
?x0 ns:film.producer.film|ns:film.production_company.films M1 .
?x0 ns:film.producer.film|ns:film.production_company.films M2 .
?x0 ns:people.person.nationality ns:m.0b90_r .
M3 a ns:film.film .
M3 ns:film.film.directed_by ?x0 .
M3 ns:film.film.edited_by ?x0
}