Was a character 's sibling 's actor employed by M1 's producer and employed by M0
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.character ?x1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x2 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company 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 ?x3 .
?x2 ns:film.producer.film|ns:film.production_company.films M1 .
?x3 a ns:fictional_universe.fictional_character .
FILTER ( ?x1 != ?x3 )
}