{ "head": {
    "vars": [ "s" , "p" , "o" , "Q" ]
  } ,
  "results": {
    "bindings": [
      { 
        "s": { "type": "uri" , "value": "http://example/s" } ,
        "p": { "type": "uri" , "value": "http://example/p2" } ,
        "o": { "type": "uri" , "value": "http://example/o" } ,
        "Q": { "type": "uri" , "value": "http://example/sym" }
      }
    ]
  }
}