Who was M1 's prequel 's sequel 's editor and writer
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:film.editor.film ?x1 .
?x0 ns:film.writer.film ?x1 .
?x1 ns:film.film.prequel ?x2 .
?x2 ns:film.film.sequel M1
}