var_dump /eurovoc /concepts/4057
object(Concept)#7544 (1) {
  ["_c":protected]=>
  array(7) {
    ["inScheme"]=>
    array(2) {
      [0]=>
      int(100141)
      [1]=>
      int(100176)
    }
    ["topConceptOf"]=>
    array(2) {
      [0]=>
      int(100141)
      [1]=>
      int(100176)
    }
    ["prefLabel"]=>
    object(MLString)#7545 (1) {
      ["_c":protected]=>
      array(2) {
        ["en"]=>
        array(1) {
          [0]=>
          string(24) "enlargement of the Union"
        }
        ["fr"]=>
        array(1) {
          [0]=>
          string(22) "élargissement de l'UE"
        }
      }
    }
    ["altLabel"]=>
    object(MLString)#7546 (1) {
      ["_c":protected]=>
      array(2) {
        ["en"]=>
        array(2) {
          [0]=>
          string(13) "Natali report"
          [1]=>
          string(28) "enlargement of the Community"
        }
        ["fr"]=>
        array(3) {
          [0]=>
          string(14) "rapport Natali"
          [1]=>
          string(32) "élargissement de la Communauté"
          [2]=>
          string(37) "élargissement de l'Union européenne"
        }
      }
    }
    ["narrower"]=>
    array(4) {
      [0]=>
      int(12)
      [1]=>
      int(4063)
      [2]=>
      int(2324)
      [3]=>
      string(10) "c_8a6f744c"
    }
    ["related"]=>
    array(2) {
      [0]=>
      int(6704)
      [1]=>
      int(5137)
    }
    ["notation"]=>
    array(1) {
      [0]=>
      int(4057)
    }
  }
}