Was M2 a film distributor that employed M4 and M5 and employed a cinematographer whose sibling wrote M1
SELECT count(*) WHERE {
?x0 a ns:film.cinematographer .
?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.writer.film M1 .
FILTER ( ?x0 != ?x1 ) .
M2 a ns:film.film_distributor .
M2 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person M4 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person M5
}