Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Experimental Results I
| Module | P | R | F1 |
|---|---|---|---|
| LSTM | 34.2% | 40.6% | 37.1% |
| BiLSTM | 58.1% | 56.2% | 57.1% |
| BERT-CRF | 76.5% | 76.9% | 76.7% |
Experimental Results II
| Module | P | R | F1 |
|---|---|---|---|
| BERT | 76.50% | 76.90% | 76.70% |
| RoBERTa | 77.60% | 77.10% | 77.30% |
| ALBERT | 78.10% | 77.30% | 77.70% |