Were M3 and M4 directed by a American sibling of M1 and directed by M0 's director and executive producer
SELECT count(*) WHERE {
?x0 ns:film.director.film M0 .
?x0 ns:film.producer.films_executive_produced M0 .
?x1 ns:people.person.nationality ns:m.09c7w0 .
?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 M1 .
FILTER ( ?x1 != M1 ) .
M3 ns:film.film.directed_by ?x0 .
M3 ns:film.film.directed_by ?x1 .
M4 ns:film.film.directed_by ?x0 .
M4 ns:film.film.directed_by ?x1
}