Were M1 and M2 produced and written by a actor
SELECT count(*) WHERE {
?x0 a ns:film.actor .
M1 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M1 ns:film.film.written_by ?x0 .
M2 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M2 ns:film.film.written_by ?x0
}