{
  "train": [
    {
      "id": "a",
      "x": 0.1,
      "label": 0
    },
    {
      "id": "b",
      "x": 0.2,
      "label": 0
    },
    {
      "id": "c",
      "x": 0.8,
      "label": 1
    }
  ],
  "test": [
    {
      "id": "t1",
      "x": 0.15,
      "label": 0
    },
    {
      "id": "t2",
      "x": 0.9,
      "label": 1
    }
  ]
}