How to Write Summaries with Patterns? Learning towards Abstractive Summarization through Prototype Editing
Table 3: ROUGE scores comparison with baselines. Proto directly copies from the prototype summary as generated summary.
['[EMPTY]', 'R1', 'R2', 'RL']
Our model performs consistently better than other summarization models including the state-of-the-art model with improvements of 6%, 12% and 6% in terms of ROUGE-1, ROUGE-2 and ROUGE-L. This demonstrates that prototype document-summary pair provides strong guidance for summary generation that cannot be replaced by other complicated baselines without prototype information. Meanwhile, directly concatenating the prototype summary with the original input does not increase performance, instead leading to drops of 9%, 17%, 8% and 1%, 3%, 2% in terms of ROUGE 1,2,L on the S2S and Unified models, respectively. As for the baseline model Proto, we found that it directly copies from the prototype summary as generated summary, which leads to a totally useless and incorrect summary.