Project(Extend(Extend(Union(Graph(?g,
                                  BGP( ?sg <http://www.triple-s.org/sw/2014-08-19/1.2#hasVariable> ?o)),
                            BGP( ?sd <http://www.triple-s.org/sw/2014-08-19/1.2#hasVariable> ?o)),
                      ?countInGraph,
                      count(?sg) ),
               ?countInDefault,
               count(?sd) ),
        {?countInGraph, ?countInDefault})