What film was written by M1 and M2 and edited by a person that M4 employed
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.edited_by ?x1 .
?x0 ns:film.film.written_by M1 .
?x0 ns:film.film.written_by M2 .
?x1 a ns:people.person .
?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M4
}