Counts from rows (i) and (ii) were taken directly from the corpora; row (iii) count was estimated based on SPARQL queries that aim at linking NIL entities to the KB; and counts for columns (iv) and (v) were estimated based on annotating samples from each data set.
reuse of old gold standards can lead to problematic results (e.g., entities declared NIL in the gold can currently exist in the current KB version and can be retrieved by annotator tools) or even unfair evaluations (e.g., tools that use an old KB should not be compared with those who use the latest updates).