Which sequel of a sequel of M2 did M0 and M1 edit
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.edited_by M0 .
?x0 ns:film.film.edited_by M1 .
?x0 ns:film.film.prequel ?x1 .
?x1 ns:film.film.prequel M2
}