How to Write Summaries with Patterns? Learning towards Abstractive Summarization through Prototype Editing
Figure 5: Visualizations of ROUGE score with different hop numbers.
['[EMPTY]', 'R1', 'R2', 'RL']
All ablation models perform worse than PESG in terms of all metrics, which demonstrates the preeminence of PESG. More importantly, by this controlled experiment, we can verify the contributions of each modules in PESG. We investigate the influence of the iteration number when facts are extracted. The results show that the ROUGE scores first increases with the number of hops. After reaching an upper limit it then begins to drop. This phenomenon demonstrates that the fact extraction module is effective by polishing the facts representation.