var_dump /eurovoc /concepts/552
object(Concept)#7463 (1) {
  ["_c":protected]=>
  array(7) {
    ["inScheme"]=>
    array(2) {
      [0]=>
      int(100141)
      [1]=>
      int(100183)
    }
    ["prefLabel"]=>
    object(MLString)#7464 (1) {
      ["_c":protected]=>
      array(2) {
        ["fr"]=>
        array(1) {
          [0]=>
          string(20) "droit des étrangers"
        }
        ["en"]=>
        array(1) {
          [0]=>
          string(16) "rights of aliens"
        }
      }
    }
    ["altLabel"]=>
    object(MLString)#7465 (1) {
      ["_c":protected]=>
      array(2) {
        ["fr"]=>
        array(2) {
          [0]=>
          string(25) "principe de réciprocité"
          [1]=>
          string(24) "réciprocité des droits"
        }
        ["en"]=>
        array(2) {
          [0]=>
          string(24) "principle of reciprocity"
          [1]=>
          string(21) "reciprocity of rights"
        }
      }
    }
    ["broader"]=>
    array(1) {
      [0]=>
      int(566)
    }
    ["narrower"]=>
    array(2) {
      [0]=>
      int(4004)
      [1]=>
      int(4005)
    }
    ["related"]=>
    array(3) {
      [0]=>
      int(1912)
      [1]=>
      int(2509)
      [2]=>
      int(950)
    }
    ["notation"]=>
    array(1) {
      [0]=>
      int(552)
    }
  }
}