{
  "type": "project",
  "input": {
    "type": "values",
    "variables": [
      {
        "termType": "Variable",
        "value": "y"
      },
      {
        "termType": "Variable",
        "value": "z"
      }
    ],
    "bindings": [
      {
        "y": {
          "termType": "NamedNode",
          "value": "http://example.com/ns#a"
        },
        "z": {
          "termType": "NamedNode",
          "value": "http://example.com/ns#b"
        }
      }
    ]
  },
  "variables": [
    {
      "termType": "Variable",
      "value": "y"
    },
    {
      "termType": "Variable",
      "value": "z"
    }
  ]
}