What was directed by a film producer that wrote M4 and directed by M0 , M1 , and M2
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.directed_by ?x1 .
?x0 ns:film.film.directed_by M0 .
?x0 ns:film.film.directed_by M1 .
?x0 ns:film.film.directed_by M2 .
?x1 a ns:film.producer .
?x1 ns:film.writer.film M4
}