Were M3 and M4 produced by a director and executive producer of M2 and produced by a Mexican film producer 's sibling
SELECT count(*) WHERE {
?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 ?x1 .
?x1 a ns:film.producer .
?x1 ns:people.person.nationality ns:m.0b90_r .
?x2 ns:film.director.film M2 .
?x2 ns:film.producer.films_executive_produced M2 .
FILTER ( ?x0 != ?x1 ) .
M3 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M3 ns:film.film.produced_by|ns:film.film.production_companies ?x2 .
M4 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M4 ns:film.film.produced_by|ns:film.film.production_companies ?x2
}