var_dump /eurovoc /concepts/4068
object(Concept)#6948 (1) {
  ["_c":protected]=>
  array(6) {
    ["inScheme"]=>
    array(2) {
      [0]=>
      int(100141)
      [1]=>
      int(100175)
    }
    ["prefLabel"]=>
    object(MLString)#6949 (1) {
      ["_c":protected]=>
      array(2) {
        ["en"]=>
        array(1) {
          [0]=>
          string(24) "Treaty on European Union"
        }
        ["fr"]=>
        array(1) {
          [0]=>
          string(31) "traité sur l'Union européenne"
        }
      }
    }
    ["altLabel"]=>
    object(MLString)#6950 (1) {
      ["_c":protected]=>
      array(2) {
        ["fr"]=>
        array(4) {
          [0]=>
          string(3) "TUE"
          [1]=>
          string(37) "projet de traité d'Union européenne"
          [2]=>
          string(10) "traité UE"
          [3]=>
          string(21) "traité de Maastricht"
        }
        ["en"]=>
        array(6) {
          [0]=>
          string(3) "TEU"
          [1]=>
          string(30) "Draft Treaty on European Union"
          [2]=>
          string(9) "EU Treaty"
          [3]=>
          string(21) "European Union Treaty"
          [4]=>
          string(17) "Maastricht Treaty"
          [5]=>
          string(20) "Treaty of Maastricht"
        }
      }
    }
    ["broader"]=>
    array(1) {
      [0]=>
      int(4479)
    }
    ["related"]=>
    array(1) {
      [0]=>
      int(4060)
    }
    ["notation"]=>
    array(1) {
      [0]=>
      int(4068)
    }
  }
}