Did a company distribute M1 and distribute a prequel of M2
SELECT count(*) WHERE {
?x0 a ns:business.employer .
?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film ?x1 .
?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M1 .
?x1 ns:film.film.sequel M2
}