Were M2 and M3 executive produced by M0 's child and executive produced by M1 's costume designer 's sibling
SELECT count(*) WHERE {
?x0 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent M0 .
?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 ?x2 .
?x2 ns:film.film_costumer_designer.costume_design_for_film M1 .
FILTER ( ?x1 != ?x2 ) .
M2 ns:film.film.executive_produced_by ?x0 .
M2 ns:film.film.executive_produced_by ?x1 .
M3 ns:film.film.executive_produced_by ?x0 .
M3 ns:film.film.executive_produced_by ?x1
}