arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2201.03188cs.CL
收藏

写作风格感知的文档级事件抽取

Writing Style Aware Document-level Event Extraction

Central University of Finance and Economics(中央财经大学)

Zhuo Xu, Yue Wang, Lu Bai, Lixin Cui

摘要:

事件抽取技术是一种旨在从文档中自动提取结构化信息的技术,在各个领域受到了越来越多的关注。现有的大多数工作讨论了这个问题的令牌级多标签分类框架区分令牌作为不同的角色,而忽略了文档的写作风格。写作风格是文档内容组织的一种特殊方式,在具有特定领域的文档(如金融、医疗文档等)中,写作风格是相对固定的。我们认为,写作风格包含了重要的线索,判断令牌的作用和忽视这些模式可能会导致现有的作品的性能下降。为此,我们将文档中的写作风格建模为参数角色的分布,即,角色等级分布的事件抽取模型,并提出了一种基于角色等级分布的监督机制,通过事件抽取任务的监督训练过程来捕捉这种模式。我们将我们的模型与几个真实世界数据集上的最先进方法进行了比较。实证结果表明,我们的方法优于其他替代方案与捕获的模式。这验证了书写风格包含有价值的信息,可以提高事件提取任务的性能。

英文摘要:

Event extraction, the technology that aims to automatically get the structural information from documents, has attracted more and more attention in many fields. Most existing works discuss this issue with the token-level multi-label classification framework by distinguishing the tokens as different roles while ignoring the writing styles of documents. The writing style is a special way of content organizing for documents and it is relative fixed in documents with a special field (e.g. financial, medical documents, etc.). We argue that the writing style contains important clues for judging the roles for tokens and the ignorance of such patterns might lead to the performance degradation for the existing works. To this end, we model the writing style in documents as a distribution of argument roles, i.e., Role-Rank Distribution, and propose an event extraction model with the Role-Rank Distribution based Supervision Mechanism to capture this pattern through the supervised training process of an event extraction task. We compare our model with state-of-the-art methods on several real-world datasets. The empirical results show that our approach outperforms other alternatives with the captured patterns. This verifies the writing style contains valuable information that could improve the performance of the event extraction task.

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。

↑