Which screenwriter edited M1 , edited M2 , M3 , and M4 , and edited a film
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.writer .
?x0 ns:film.editor.film ?x1 .
?x0 ns:film.editor.film M1 .
?x0 ns:film.editor.film M2 .
?x0 ns:film.editor.film M3 .
?x0 ns:film.editor.film M4 .
?x1 a ns:film.film
}