$result = array();
$res1 = new Resource("http://example.org/ns#a2");
$res2 = new Resource("http://example.org/ns#c2");
$res3 = new Resource("http://example.org/ns#f");

$arr["?a"]=$res1;
$arr["?c"]=$res2;
$arr1["?a"]=$res2;
$arr1["?c"]=$res3;

$result["rowcount"]=2;
$result["hits"]=2;
$result["part"][]=$arr;
$result["part"][]=$arr1;