{
  "type": "project",
  "input": {
    "type": "extend",
    "input": {
      "type": "group",
      "input": {
        "type": "bgp",
        "patterns": [
          {
            "type": "pattern",
            "termType": "Quad",
            "subject": {
              "termType": "Variable",
              "value": "s"
            },
            "predicate": {
              "termType": "Variable",
              "value": "p"
            },
            "object": {
              "termType": "Variable",
              "value": "o"
            },
            "graph": {
              "termType": "Variable",
              "value": "g"
            }
          }
        ]
      },
      "variables": [],
      "aggregates": [
        {
          "type": "expression",
          "subType": "aggregate",
          "aggregator": "count",
          "expression": {
            "type": "expression",
            "subType": "wildcard",
            "wildcard": {
              "type": "wildcard"
            }
          },
          "distinct": false,
          "variable": {
            "termType": "Variable",
            "value": "var0"
          }
        }
      ]
    },
    "variable": {
      "termType": "Variable",
      "value": "count"
    },
    "expression": {
      "type": "expression",
      "subType": "term",
      "term": {
        "termType": "Variable",
        "value": "var0"
      }
    }
  },
  "variables": [
    {
      "termType": "Variable",
      "value": "count"
    }
  ]
}