Was M0 's prequel written and directed by M1 , M2 , M3 , M4 , M5 , and M6
SELECT count(*) WHERE {
?x0 ns:film.film.directed_by M1 .
?x0 ns:film.film.directed_by M2 .
?x0 ns:film.film.directed_by M3 .
?x0 ns:film.film.directed_by M4 .
?x0 ns:film.film.directed_by M5 .
?x0 ns:film.film.directed_by M6 .
?x0 ns:film.film.sequel M0 .
?x0 ns:film.film.written_by M1 .
?x0 ns:film.film.written_by M2 .
?x0 ns:film.film.written_by M3 .
?x0 ns:film.film.written_by M4 .
?x0 ns:film.film.written_by M5 .
?x0 ns:film.film.written_by M6
}