Did M2 star M3 and star a Mexican film producer
SELECT count(*) WHERE {
?x0 a ns:film.producer .
?x0 ns:people.person.nationality ns:m.0b90_r .
M2 ns:film.film.starring/ns:film.performance.actor ?x0 .
M2 ns:film.film.starring/ns:film.performance.actor M3
}