public static void listNotManagedByHarper(EntityManager entityManager) {
		TypedQuery<Project> query = entityManager.createQuery(
						"select pr from Project pr where pr not in (select p from Project p left join p.employees e where e.firstName = 'Harper')",	Project.class);
		List<Project> resultList = query.getResultList();

		entityManager.close();

		for (Project project : resultList) {
			System.out.println(project);
		}
	}