Were M1 and M4 executive produced by M2 , executive produced by a character 's actor 's sibling , and executive produced by M3
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.character ?x2 .
?x2 a ns:fictional_universe.fictional_character .
FILTER ( ?x0 != ?x1 ) .
M1 ns:film.film.executive_produced_by ?x0 .
M1 ns:film.film.executive_produced_by M2 .
M1 ns:film.film.executive_produced_by M3 .
M4 ns:film.film.executive_produced_by ?x0 .
M4 ns:film.film.executive_produced_by M2 .
M4 ns:film.film.executive_produced_by M3
}