What film editor that was employed by a production company directed M1 and M2 and directed M3 and M4
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.editor .
?x0 ns:film.director.film M1 .
?x0 ns:film.director.film M2 .
?x0 ns:film.director.film M3 .
?x0 ns:film.director.film M4 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x1 a ns:film.production_company
}