What film did M2 edit , M3 's editor edit , and M1 write
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.edited_by ?x1 .
?x0 ns:film.film.edited_by M2 .
?x0 ns:film.film.written_by M1 .
?x1 ns:film.editor.film M3
}