array(10) {
  [0]=>
  string(6) "Sensor"
  [1]=>
  string(2) "at"
  [2]=>
  string(4) "x=2,"
  [3]=>
  string(5) "y=18:"
  [4]=>
  string(7) "closest"
  [5]=>
  string(6) "beacon"
  [6]=>
  string(2) "is"
  [7]=>
  string(2) "at"
  [8]=>
  string(5) "x=-2,"
  [9]=>
  string(6) "y=15
"
}
array(2) {
  [0]=>
  array(2) {
    [0]=>
    string(1) "2"
    [1]=>
    string(2) "18"
  }
  [1]=>
  array(2) {
    [0]=>
    string(2) "-2"
    [1]=>
    string(4) "15
"
  }
}