Table 3.

Test results of the two neural network models on given dataset

Entity name	BiLSTM-CRF			Attention-BiLSTM-CRF
	Strict index (%)			Strict index (%)
	P	R	F1	P	R	F1
Anatomy	85.57	85.61	85.59	86.29	86.24	86.27
Surgery	85.81	85.58	85.69	86.19	84.90	85.54
Drug	94.92	78.11	85.70	89.73	85.98	87.81
Independent symptom	92.45	89.52	90.96	91.93	90.20	91.05
Symptom description	91.81	87,91	89.82	91.58	87.69	89.59
Total	87.66	85.72	86.68	87.75	86.77	87.26