Was M3 a company whose founder edited M0 and directed M1 and M2
SELECT count(*) WHERE {
?x0 ns:film.director.film M1 .
?x0 ns:film.director.film M2 .
?x0 ns:film.editor.film M0 .
M3 a ns:business.employer .
M3 ns:organization.organization.founders ?x0
}