{
  "type": "project",
  "input": {
    "type": "extend",
    "input": {
      "type": "extend",
      "input": {
        "type": "group",
        "input": {
          "type": "bgp",
          "patterns": [
            {
              "type": "pattern",
              "termType": "Quad",
              "subject": {
                "termType": "Variable",
                "value": "s"
              },
              "predicate": {
                "termType": "NamedNode",
                "value": "http://example.org/value"
              },
              "object": {
                "termType": "Variable",
                "value": "o"
              },
              "graph": {
                "termType": "DefaultGraph",
                "value": ""
              }
            },
            {
              "type": "pattern",
              "termType": "Quad",
              "subject": {
                "termType": "Variable",
                "value": "s"
              },
              "predicate": {
                "termType": "NamedNode",
                "value": "http://example.org/weight"
              },
              "object": {
                "termType": "Variable",
                "value": "w"
              },
              "graph": {
                "termType": "DefaultGraph",
                "value": ""
              }
            }
          ]
        },
        "variables": [
          {
            "termType": "Variable",
            "value": "s"
          }
        ],
        "aggregates": [
          {
            "type": "expression",
            "subType": "named",
            "name": {
              "termType": "NamedNode",
              "value": "http://example.org/median"
            },
            "args": [
              {
                "type": "expression",
                "subType": "term",
                "term": {
                  "termType": "Variable",
                  "value": "o"
                }
              },
              {
                "type": "expression",
                "subType": "term",
                "term": {
                  "termType": "Variable",
                  "value": "w"
                }
              }
            ],
            "aggregate": true,
            "distinct": true,
            "variable": {
              "termType": "Variable",
              "value": "var0"
            }
          },
          {
            "type": "expression",
            "subType": "named",
            "name": {
              "termType": "NamedNode",
              "value": "http://example.org/median"
            },
            "args": [],
            "aggregate": true,
            "distinct": false,
            "variable": {
              "termType": "Variable",
              "value": "var1"
            }
          }
        ]
      },
      "variable": {
        "termType": "Variable",
        "value": "weighted"
      },
      "expression": {
        "type": "expression",
        "subType": "term",
        "term": {
          "termType": "Variable",
          "value": "var0"
        }
      }
    },
    "variable": {
      "termType": "Variable",
      "value": "none"
    },
    "expression": {
      "type": "expression",
      "subType": "term",
      "term": {
        "termType": "Variable",
        "value": "var1"
      }
    }
  },
  "variables": [
    {
      "termType": "Variable",
      "value": "s"
    },
    {
      "termType": "Variable",
      "value": "weighted"
    },
    {
      "termType": "Variable",
      "value": "none"
    }
  ]
}