Was M3 produced by and edited by a British screenwriter that produced M2
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x0 ns:film.producer.film|ns:film.production_company.films M2 .
?x0 ns:people.person.nationality ns:m.07ssc .
M3 ns:film.film.edited_by ?x0 .
M3 ns:film.film.produced_by|ns:film.film.production_companies ?x0
}