OrderBy(Project(Extend(Extend(AggregationJoin(Aggregation(??agg1: ?type, SAMPLE,
                                              {},
                                              G1=Group((?type),
                                                 BGP( ?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ?type))),
                                              Aggregation(??agg2: ?s, COUNT,
                                              {}, G1)),
                              ?type,
                              ??agg1),
                       ?count,
                       ??agg2),
                {?type, ?count}), (desc (?count)))