Which film did M3 edit , M4 edit , M1 write , and M2 write
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.edited_by M3 .
?x0 ns:film.film.edited_by M4 .
?x0 ns:film.film.written_by M1 .
?x0 ns:film.film.written_by M2
}