Was M0 's sibling a film editor that was employed by M2 and M3 and was employed by M4 's executive producer 's employer
SELECT count(*) WHERE {
?x0 a ns:film.editor .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
?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 M0 .
?x1 ns:business.employer.employees/ns:business.employment_tenure.person ?x2 .
?x2 ns:film.producer.films_executive_produced M4 .
FILTER ( ?x0 != M0 )
}