var_dump /eurovoc /concepts/5442
object(Concept)#2041 (1) {
  ["_c":protected]=>
  array(6) {
    ["inScheme"]=>
    array(2) {
      [0]=>
      int(100141)
      [1]=>
      int(100176)
    }
    ["topConceptOf"]=>
    array(2) {
      [0]=>
      int(100141)
      [1]=>
      int(100176)
    }
    ["prefLabel"]=>
    object(MLString)#2042 (1) {
      ["_c":protected]=>
      array(2) {
        ["fr"]=>
        array(1) {
          [0]=>
          string(40) "approfondissement de l'Union européenne"
        }
        ["en"]=>
        array(1) {
          [0]=>
          string(31) "deepening of the European Union"
        }
      }
    }
    ["altLabel"]=>
    object(MLString)#2043 (1) {
      ["_c":protected]=>
      array(2) {
        ["fr"]=>
        array(1) {
          [0]=>
          string(35) "approfondissement de la Communauté"
        }
        ["en"]=>
        array(3) {
          [0]=>
          string(26) "deepening of the Community"
          [1]=>
          string(36) "further development of the Community"
          [2]=>
          string(41) "further development of the European Union"
        }
      }
    }
    ["narrower"]=>
    array(11) {
      [0]=>
      int(4183)
      [1]=>
      int(3299)
      [2]=>
      int(5499)
      [3]=>
      int(3234)
      [4]=>
      int(5418)
      [5]=>
      int(5629)
      [6]=>
      int(6274)
      [7]=>
      int(4070)
      [8]=>
      int(5948)
      [9]=>
      string(4) "1464"
      [10]=>
      string(10) "c_59f9c651"
    }
    ["notation"]=>
    array(1) {
      [0]=>
      int(5442)
    }
  }
}