Did M2 and M6 star M3 and M4 , star M0 's Mexican sibling , and star M5
SELECT count(*) WHERE {
?x0 ns:people.person.nationality ns:m.0b90_r .
?x0 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 M0 .
FILTER ( ?x0 != M0 ) .
M2 ns:film.film.starring/ns:film.performance.actor ?x0 .
M2 ns:film.film.starring/ns:film.performance.actor M3 .
M2 ns:film.film.starring/ns:film.performance.actor M4 .
M2 ns:film.film.starring/ns:film.performance.actor M5 .
M6 ns:film.film.starring/ns:film.performance.actor ?x0 .
M6 ns:film.film.starring/ns:film.performance.actor M3 .
M6 ns:film.film.starring/ns:film.performance.actor M4 .
M6 ns:film.film.starring/ns:film.performance.actor M5
}