Were M1 , M4 , M5 , M6 , and M7 directed by a film editor and written by M2 and M3
SELECT count(*) WHERE {
?x0 a ns:film.editor .
M1 ns:film.film.directed_by ?x0 .
M1 ns:film.film.written_by M2 .
M1 ns:film.film.written_by M3 .
M4 ns:film.film.directed_by ?x0 .
M4 ns:film.film.written_by M2 .
M4 ns:film.film.written_by M3 .
M5 ns:film.film.directed_by ?x0 .
M5 ns:film.film.written_by M2 .
M5 ns:film.film.written_by M3 .
M6 ns:film.film.directed_by ?x0 .
M6 ns:film.film.written_by M2 .
M6 ns:film.film.written_by M3 .
M7 ns:film.film.directed_by ?x0 .
M7 ns:film.film.written_by M2 .
M7 ns:film.film.written_by M3
}