When the model went to deeper flat NER layers, the performance dropped gradually as the number of gold entities decreased.
the performance for predictions on each flat Layer P (%) R (%) F (%) EP (%) ER (%) EF (%) #Predictions #Gold Entities  0.00 0.00 0.00 0.00 10.00 0.00 0 10 Layer 5 0.00 0.00 0.00 0.00 0.00 0.00 0 1 NER layer was different in terms of extended evaluation metrics.