Table 5.

Test results of the two models with post-processing rules

Approach	Strict index (%)
	P	R	F1
BiLSTM-CRF	87.66	85.72	86.68
BiLSTM-CRF + rule	89.43	87.47	88.44
Attention-BiLSTM-CRF	87.75	86.77	87.26
Attention-BiLSTM-CRF + rule	89.61	88.58	89.09