Was M3 produced by a screenwriter that M1 and M2 were directed by
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x0 ns:film.director.film M1 .
?x0 ns:film.director.film M2 .
M3 ns:film.film.produced_by|ns:film.film.production_companies ?x0
}