Were M2 and M5 written by a person , written by M3 and M4 , and directed by M1 's editor
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x1 ns:film.editor.film M1 .
M2 ns:film.film.directed_by ?x1 .
M2 ns:film.film.written_by ?x0 .
M2 ns:film.film.written_by M3 .
M2 ns:film.film.written_by M4 .
M5 ns:film.film.directed_by ?x1 .
M5 ns:film.film.written_by ?x0 .
M5 ns:film.film.written_by M3 .
M5 ns:film.film.written_by M4
}