Was M1 a sibling of M0 's employee 's actor
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.character ?x1 .
?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M0 .
FILTER ( M1 != ?x0 ) .
M1 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 ?x0
}