{
  "type": "and",
  "predicates": [
    {
      "type": "equals",
      "key": "COUNTRY",
      "value": "CN",
      "matchCase": false
    },
    {
      "type": "and",
      "predicates": [
        {
          "type": "greaterThanOrEquals",
          "key": "YEAR",
          "value": "1950",
          "matchCase": false
        },
        {
          "type": "lessThanOrEquals",
          "key": "YEAR",
          "value": "2021",
          "matchCase": false
        }
      ]
    }
  ]
}