What was edited by a costume designer and edited by M1 's employee
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.edited_by ?x1 .
?x0 ns:film.film.edited_by ?x2 .
?x1 a ns:film.film_costumer_designer .
?x2 ns:people.person.employment_history/ns:business.employment_tenure.company M1
}