Who was a film editor that M2 and M3 were directed and edited by
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.editor .
?x0 a ns:people.person .
?x0 ns:film.director.film M2 .
?x0 ns:film.director.film M3 .
?x0 ns:film.editor.film M2 .
?x0 ns:film.editor.film M3
}