{
  "head": {
    "vars": [ "s" ]
  } ,
  "results": {
    "distinct": false ,
    "ordered": false ,
    "bindings": [
      {
        "s": { "type": "uri" , "value": "http://example/x" }
      } ,
      {
        "s": { "type": "uri" , "value": "http://example/x" }
      }
    ]
  }
}
