Were M3 and M4 written by a film 's editor and written by a British actor of M1
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.character M1 .
?x0 ns:people.person.nationality ns:m.07ssc .
?x1 ns:film.editor.film ?x2 .
?x2 a ns:film.film .
M3 ns:film.film.written_by ?x0 .
M3 ns:film.film.written_by ?x1 .
M4 ns:film.film.written_by ?x0 .
M4 ns:film.film.written_by ?x1
}