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