Were M1 and M2 directed by and executive produced by a sibling of a star of M0
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 ns:film.actor.film/ns:film.performance.film M0 .
FILTER ( ?x0 != ?x1 ) .
M1 ns:film.film.directed_by ?x0 .
M1 ns:film.film.executive_produced_by ?x0 .
M2 ns:film.film.directed_by ?x0 .
M2 ns:film.film.executive_produced_by ?x0
}