Did a film star M3 's Mexican Spanish sibling and star M1 and M2
SELECT count(*) WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.starring/ns:film.performance.actor ?x1 .
?x0 ns:film.film.starring/ns:film.performance.actor M1 .
?x0 ns:film.film.starring/ns:film.performance.actor M2 .
?x1 ns:people.person.nationality ns:m.06mkj .
?x1 ns:people.person.nationality ns:m.0b90_r .
?x1 ns:people.person.sibling_s/ns:people.sibling_relationship.sibling|ns:fictional_universe.fictional_character.siblings/ns:fictional_universe.sibling_relationship_of_fictional_characters.siblings M3 .
FILTER ( ?x1 != M3 )
}