OrderBy(Project(Extend(Extend(AggregationJoin(Aggregation(??agg1: ?g, SAMPLE,
                                              {},
                                              G1=Group((?g),
                                                 Graph(?g,
                                                 BGP( ?s <urn:dydra:state> ?ops)))),
                                              Aggregation(??agg2: ?s, COUNT,
                                              {}, G1)),
                              ?g,
                              ??agg1),
                       ?count,
                       ??agg2),
                {?g, ?count}), (desc (?count)))