Was M2 edited by a British screenwriter and edited by M3 , M4 , and M5
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x0 ns:people.person.nationality ns:m.07ssc .
M2 ns:film.film.edited_by ?x0 .
M2 ns:film.film.edited_by M3 .
M2 ns:film.film.edited_by M4 .
M2 ns:film.film.edited_by M5
}