Table 3.

Compare the F1 scores of entity recognition in various models.

Entity(freq. in test set)	MaxEnt	BiLSTM-CRF	BiGRU-CRF	BERT-CRF	BERT-BiLSTM-CRF
MATERIAL(92)	43.37	49.56	50.40	57.58	57.96
METHOD(97)	37.97	46.35	47.88	56.45	57.41
PRODUCT(94)	68.25	81.88	82.16	89.97	90.86
FARADAIC EFFICIENCY(62)	83.68	87.56	87.98	92.12	92.68
Macro-avg F1	49.23	64.44	65.58	69.47	70.12
Micro-avg F1	68.03	78.03	80.69	81.56	81.95