Did M3 star a British Mexican star of M2
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.film M2 .
?x0 ns:people.person.nationality ns:m.07ssc .
?x0 ns:people.person.nationality ns:m.0b90_r .
M3 ns:film.film.starring/ns:film.performance.actor ?x0
}