Question: How much does their model outperform existing models?
Answer: Best proposed model result vs best previous result:
Arxiv dataset: Rouge 1 (43.62 vs 42.81), Rouge L (29.30 vs 31.80), Meteor (21.78 vs 21.35)
Pubmed dataset: Rouge 1 (44.85 vs 44.29), Rouge L (31.48 vs 35.21), Meteor (20.83 vs 20.56)
Alternative answer: On arXiv dataset, the proposed model outperforms baselie model by (ROUGE-1,2,L)  0.67 0.72 0.77 respectively and by Meteor 0.31.