Were M3 and M4 produced by and written by a British screenwriter that wrote M1
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x0 ns:film.writer.film M1 .
?x0 ns:people.person.nationality ns:m.07ssc .
M3 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M3 ns:film.film.written_by ?x0 .
M4 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M4 ns:film.film.written_by ?x0
}