Was M1 written by M2 , edited by M3 , M4 , M5 , and M6 , and edited by a film producer
SELECT count(*) WHERE {
?x0 a ns:film.producer .
M1 ns:film.film.edited_by ?x0 .
M1 ns:film.film.edited_by M3 .
M1 ns:film.film.edited_by M4 .
M1 ns:film.film.edited_by M5 .
M1 ns:film.film.edited_by M6 .
M1 ns:film.film.written_by M2
}