What film that M5 and M6 wrote starred M1 , starred M2 and M3 , and starred M4
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.starring/ns:film.performance.actor M1 .
?x0 ns:film.film.starring/ns:film.performance.actor M2 .
?x0 ns:film.film.starring/ns:film.performance.actor M3 .
?x0 ns:film.film.starring/ns:film.performance.actor M4 .
?x0 ns:film.film.written_by M5 .
?x0 ns:film.film.written_by M6
}