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arXiv 2203.02797cs.CL
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ClueGraphSum:用关键线索指导跨语言抽象文摘

ClueGraphSum: Let Key Clues Guide the Cross-Lingual Abstractive Summarization

Sichuan University(四川大学);National Computer Network Emergency Response Technical Team / Coordination Center of China(国家计算机网络应急技术处理协调中心)

Shuyu Jiang, Dengbiao Tu, Xingshu Chen, Rui Tang, Wenxian Wang, Haizhou Wang

摘要:

跨语言摘要(CLS)是为不同语言的文章生成一种语言摘要的任务。以往对CLS的研究主要采用流水线方法或利用翻译后的并行数据对端到端模型进行训练。然而,生成的跨语言摘要的质量需要更多的进一步努力来提高,并且模型性能从未在手写CLS数据集上进行过评估。因此,我们首先提出了一种线索引导的跨语言摘要方法,以提高跨语言摘要的质量,然后构建一个新的手写CLS数据集进行评估。具体来说,我们提取输入文章的关键词,命名实体等作为摘要的关键线索,然后设计一个线索引导算法将文章转换为具有较少噪声句子的图。构建Graph编码器学习句子语义和文章结构,构建Clue编码器对关键线索进行编码和翻译,确保生成的摘要中保留重要部分的信息。这两个编码器由一个解码器连接,以直接学习跨语言语义。实验结果表明,该方法对较长的输入具有较强的鲁棒性,在强基线上显著提高了性能,与现有SOTA相比,ROUGE-1(英汉摘要)和MoverScore(汉英摘要)得分分别提高了8.55和2.13。

英文摘要:

Cross-Lingual Summarization (CLS) is the task to generate a summary in one language for an article in a different language. Previous studies on CLS mainly take pipeline methods or train the end-to-end model using the translated parallel data. However, the quality of generated cross-lingual summaries needs more further efforts to improve, and the model performance has never been evaluated on the hand-written CLS dataset. Therefore, we first propose a clue-guided cross-lingual abstractive summarization method to improve the quality of cross-lingual summaries, and then construct a novel hand-written CLS dataset for evaluation. Specifically, we extract keywords, named entities, etc. of the input article as key clues for summarization and then design a clue-guided algorithm to transform an article into a graph with less noisy sentences. One Graph encoder is built to learn sentence semantics and article structures and one Clue encoder is built to encode and translate key clues, ensuring the information of important parts are reserved in the generated summary. These two encoders are connected by one decoder to directly learn cross-lingual semantics. Experimental results show that our method has stronger robustness for longer inputs and substantially improves the performance over the strong baseline, achieving an improvement of 8.55 ROUGE-1 (English-to-Chinese summarization) and 2.13 MoverScore (Chinese-to-English summarization) scores over the existing SOTA.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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