Were M3 and M4 edited and written by a Japanese film producer that a sequel of M2 was executive produced by
SELECT count(*) WHERE {
?x0 a ns:film.producer .
?x0 ns:film.producer.films_executive_produced ?x1 .
?x0 ns:people.person.nationality ns:m.03_3d .
?x1 ns:film.film.prequel M2 .
M3 ns:film.film.edited_by ?x0 .
M3 ns:film.film.written_by ?x0 .
M4 ns:film.film.edited_by ?x0 .
M4 ns:film.film.written_by ?x0
}