String ouder = "Kind";
        Iterator<Relatie> it = p.getRelaties();
        while (it.hasNext()) {
            Relatie r = it.next();
            Iterator<Persoon> it2 = r.getKinderen();
            while (it2.hasNext()) {
                Persoon p2 = it2.next();
                ouder = "Ouder";
            }
        }