Slice(OrderBy(Project(Extend(Extend(Extend(Extend(AggregationJoin(Aggregation(??agg1: ?exhib, SAMPLE,
                                                                  {},
                                                                  G1=Group((?exhib),
                                                                     Extend(BGP( ?exhib <http://purl.org/net/ns/ext/moma#hasArtist> ?who .
                                                                             ?exhib <http://schema.org/name> ?name .
                                                                             ?exhib <http://schema.org/startDate> ?when),
                                                                     ?dispname,
                                                                     substr(?name, 1, 50) ))),
                                                  Aggregation(??agg2: ?who, COUNT,
                                                  {}, G1),
                                                  Aggregation(??agg3: ?when, SAMPLE,
                                                  {}, G1),
                                                  Aggregation(??agg4: ?dispname, SAMPLE,
                                                  {}, G1)),
                                           ?exhib,
                                           ??agg1),
                                           ?artists,
                                           ??agg2),
                                    ?when,
                                    ??agg3),
                             ?dispname,
                             ??agg4),
                      {?exhib, ?artists, ?when, ?dispname}), (desc (?artists))),
      0,
      50)