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