Array
(
    [prop] => Array
        (
            [2] => Array
                (
                    [0] => 520
                    [1] => 527
                    [2] => 539
                    [3] => 575
                    [4] => 578
                    [5] => 614
                    [6] => 685
                    [7] => 686
                    [8] => 690
                    [9] => 697
                    [10] => 699
                    [11] => 707
                )

        )

)