Model

CPC

PC

BLEU-4

BERT-Score

P-Cover

P-EM

BLEU-4

BERT-Score

P-Cover

P-EM

BERT-HCM

18.08

0.423

40.58

86.25

3.62

0.122

13.41

73.40

w/o BERT

11.08

0.345

33.69

83.86

2.23

0.069

12.89

69.70

w/o HCM

16.94

0.421

38.25

85.53

3.31

0.120

13.34

70.85