em.getTransaction().begin();

        List<Address> addresses = em.createQuery("SELECT a FROM Address a ORDER BY a.employees.size DESC, a.town.id ASC",Address.class)
                .setMaxResults(10).getResultList();

        for (Address address : addresses) {

            System.out.printf("%s, %s - %d employees%n",
                    address.getText(),
                    address.getTown().getName(),
                    address.getEmployees().size());
        }

        em.getTransaction().commit();
        em.close();