Were M1 , M2 , and M3 edited by M0 's producer
SELECT count(*) WHERE {
?x0 ns:film.producer.film|ns:film.production_company.films M0 .
M1 ns:film.film.edited_by ?x0 .
M2 ns:film.film.edited_by ?x0 .
M3 ns:film.film.edited_by ?x0
}