int(7710)
                        NULL
                        array(0) {
}
                    

                        int(7088)
                        NULL
                        array(5) {
  [0]=>
  string(8) "Freiburg"
  [1]=>
  string(8) "Leonberg"
  [2]=>
  string(5) "Köln"
  [3]=>
  string(7) "Hamburg"
  [4]=>
  string(7) "Leipzig"
}
                    

                        int(7082)
                        NULL
                        array(1) {
  [0]=>
  string(8) "Leonberg"
}