Did M1 , M3 , M4 , M5 , and M6 direct M2 and direct M0 's prequel
SELECT count(*) WHERE {
?x0 ns:film.film.sequel M0 .
M1 ns:film.director.film ?x0 .
M1 ns:film.director.film M2 .
M3 ns:film.director.film ?x0 .
M3 ns:film.director.film M2 .
M4 ns:film.director.film ?x0 .
M4 ns:film.director.film M2 .
M5 ns:film.director.film ?x0 .
M5 ns:film.director.film M2 .
M6 ns:film.director.film ?x0 .
M6 ns:film.director.film M2
}