Was M2 founded by a film editor , founded by M3 , and founded by M1 's editor
SELECT count(*) WHERE {
?x0 a ns:film.editor .
?x1 ns:film.editor.film M1 .
M2 ns:organization.organization.founders ?x0 .
M2 ns:organization.organization.founders ?x1 .
M2 ns:organization.organization.founders M3
}