{
  "type": "project",
  "input": {
    "type": "orderby",
    "input": {
      "type": "path",
      "subject": {
        "termType": "NamedNode",
        "value": "http://example.org/A0"
      },
      "predicate": {
        "type": "ZeroOrMorePath",
        "path": {
          "type": "ZeroOrMorePath",
          "path": {
            "type": "link",
            "iri": {
              "termType": "NamedNode",
              "value": "http://example.org/P"
            }
          }
        }
      },
      "object": {
        "termType": "Variable",
        "value": "X"
      },
      "graph": {
        "termType": "DefaultGraph",
        "value": ""
      }
    },
    "expressions": [
      {
        "type": "expression",
        "subType": "term",
        "term": {
          "termType": "Variable",
          "value": "X"
        }
      }
    ]
  },
  "variables": [
    {
      "termType": "Variable",
      "value": "X"
    }
  ]
}