Method

Accuracy

recall

F1

SVM

0.34

0.24

0.28

LR

0.27

0.19

0.22

LSTM/GRU

0.60

0.32

0.41

LSTM + CRF

0.67

0.41

0.50

BiLSTM + word-level

0.47

0.27

0.34

BiLSTM + character-level

0.53

0.37

0.43

BiLSTM + word-level + POS

0.63

0.36

0.45

BiLSTM + character-level + POS

0.72

0.40

0.56