sample.json

{
  "Department": [
    {
      "ID": "1",
      "Name": "Electrical",
      "Discription": "Electrical Engineering",
      "Students": [
        {
          "id": "1",
          "name": "John"
        },
        {
          "id": "2",
          "name": "Mary"
        }
      ]
    },
    {
      "ID": "2",
      "Name": "Civil",
      "Discription": "Civil Engineering",
      "Students": [
        {
          "id": "1",
          "name": "Jack"
        },
        {
          "id": "2",
          "name": "Helen"
        }
      ]
    }
  ]
}