{
  "type": "project",
  "input": {
    "type": "join",
    "input": [
      {
        "type": "values",
        "variables": [
          {
            "termType": "Variable",
            "value": "x"
          }
        ],
        "bindings": [
          {
            "x": {
              "type": "pattern",
              "termType": "Quad",
              "subject": {
                "termType": "NamedNode",
                "value": "http://example.com/ns#s"
              },
              "predicate": {
                "termType": "NamedNode",
                "value": "http://example.com/ns#p"
              },
              "object": {
                "termType": "NamedNode",
                "value": "http://example.com/ns#o"
              },
              "graph": {
                "termType": "DefaultGraph",
                "value": ""
              }
            }
          },
          {
            "x": {
              "type": "pattern",
              "termType": "Quad",
              "subject": {
                "termType": "NamedNode",
                "value": "http://example.com/ns#x"
              },
              "predicate": {
                "termType": "NamedNode",
                "value": "http://example.com/ns#q"
              },
              "object": {
                "type": "pattern",
                "termType": "Quad",
                "subject": {
                  "termType": "NamedNode",
                  "value": "http://example.com/ns#s"
                },
                "predicate": {
                  "termType": "NamedNode",
                  "value": "http://example.com/ns#p"
                },
                "object": {
                  "termType": "NamedNode",
                  "value": "http://example.com/ns#o"
                },
                "graph": {
                  "termType": "DefaultGraph",
                  "value": ""
                }
              },
              "graph": {
                "termType": "DefaultGraph",
                "value": ""
              }
            }
          }
        ]
      },
      {
        "type": "values",
        "variables": [
          {
            "termType": "Variable",
            "value": "y"
          },
          {
            "termType": "Variable",
            "value": "z"
          }
        ],
        "bindings": [
          {
            "y": {
              "type": "pattern",
              "termType": "Quad",
              "subject": {
                "termType": "NamedNode",
                "value": "http://example.com/ns#s"
              },
              "predicate": {
                "termType": "NamedNode",
                "value": "http://example.com/ns#p"
              },
              "object": {
                "termType": "NamedNode",
                "value": "http://example.com/ns#o"
              },
              "graph": {
                "termType": "DefaultGraph",
                "value": ""
              }
            },
            "z": {
              "termType": "Literal",
              "value": "123",
              "datatype": {
                "termType": "NamedNode",
                "value": "http://www.w3.org/2001/XMLSchema#integer"
              }
            }
          },
          {
            "y": {
              "termType": "Literal",
              "value": "123",
              "datatype": {
                "termType": "NamedNode",
                "value": "http://www.w3.org/2001/XMLSchema#integer"
              }
            },
            "z": {
              "type": "pattern",
              "termType": "Quad",
              "subject": {
                "termType": "NamedNode",
                "value": "http://example.com/ns#s"
              },
              "predicate": {
                "termType": "NamedNode",
                "value": "http://example.com/ns#p"
              },
              "object": {
                "termType": "NamedNode",
                "value": "http://example.com/ns#o"
              },
              "graph": {
                "termType": "DefaultGraph",
                "value": ""
              }
            }
          }
        ]
      }
    ]
  },
  "variables": [
    {
      "termType": "Variable",
      "value": "x"
    },
    {
      "termType": "Variable",
      "value": "y"
    },
    {
      "termType": "Variable",
      "value": "z"
    }
  ]
}