Was a editor of M1 and M2 a character that directed a film
SELECT count(*) WHERE {
?x0 a ns:fictional_universe.fictional_character .
?x0 ns:film.director.film ?x1 .
?x0 ns:film.editor.film M1 .
?x0 ns:film.editor.film M2 .
?x1 a ns:film.film
}