Were M1 and M3 founded by M2 and founded by a editor of a sequel of M0
SELECT count(*) WHERE {
?x0 ns:film.editor.film ?x1 .
?x1 ns:film.film.prequel M0 .
M1 ns:organization.organization.founders ?x0 .
M1 ns:organization.organization.founders M2 .
M3 ns:organization.organization.founders ?x0 .
M3 ns:organization.organization.founders M2
}