public void listarC(){
		
		Query query = new Query("Parentezco").addSort("date", Query.SortDirection.DESCENDING);
	    List<Entity> Parentezco = datastore.prepare(query).asList(FetchOptions.Builder.withDefaults());
	    if (Parentezco.isEmpty()) {
	    	System.out.println("  no Parentezco");
	    } 
	    else {
	    	System.out.println("there Parentezco and are ....");
	        for (int i=0;i<Parentezco.size();i++) {
	        	System.out.println("--->"+Parentezco.set(i, U_ca).getProperties());
	        }
	    }    
	}