Slice(OrderBy(Project(Extend(Extend(AggregationJoin(Aggregation(??agg1: ?s, COUNT,

                                                    <KEYWORD/DISTINCT>,
                                                    G1=Group((?o),
                                                       BGP( ?s ?p ?o))),
                                                    Aggregation(??agg2: ?o, SAMPLE,
                                                    {}, G1)),
                                    ?subjectCount,
                                    ??agg1),
                             ?o,
                             ??agg2),
                      {?subjectCount, ?o}), (asc (?o))),
      0,
      64)