{
  "london": [
    { "x": 0,  "y": 10 },
    { "x": 10, "y": 0 },
    { "x": 20, "y": 20 },
    { "x": 30, "y": 40 },
    { "x": 40, "y": 60 }
  ],
  "paris": [
    { "x": 0,  "y": 80 },
    { "x": 10, "y": 60 },
    { "x": 20, "y": 40 },
    { "x": 30, "y": 20 },
    { "x": 40, "y": 0 }
  ]
}