arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2109.02592cs.CLcs.IRcs.LG
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知识图谱增强的金融文档事件提取

Knowledge Graph Enhanced Event Extraction in Financial Documents

ShanghaiTech University(上海科技大学)

Kaihao Guo, Tianpei Jiang, Haipeng Zhang

摘要:

事件抽取是自然语言处理中的一个经典任务,在处理大量快速增长的金融、法律、医疗和政府文档中得到了广泛的应用,这些文档通常包含多个事件,并且这些事件的元素分散和混合在文档中,使得问题变得更加困难。虽然被提取的事件元素之间的潜在关系提供了有用的上下文信息,但它们在以前的研究中被忽视了。我们展示了利用知识图谱捕获实体关系及其属性所带来的增强。我们提出了第一个事件提取框架,该框架通过图神经网络嵌入知识图谱,并将嵌入与常规特征集成,所有这些都在文档级。具体来说,对于从中国的财务公告中提取事件,我们的方法优于国家的最先进的方法在F1分数的5.3%。

英文摘要:

Event extraction is a classic task in natural language processing with wide use in handling large amount of yet rapidly growing financial, legal, medical, and government documents which often contain multiple events with their elements scattered and mixed across the documents, making the problem much more difficult. Though the underlying relations between event elements to be extracted provide helpful contextual information, they are somehow overlooked in prior studies. We showcase the enhancement to this task brought by utilizing the knowledge graph that captures entity relations and their attributes. We propose a first event extraction framework that embeds a knowledge graph through a Graph Neural Network and integrates the embedding with regular features, all at document-level. Specifically, for extracting events from Chinese financial announcements, our method outperforms the state-of-the-art method by 5.3% in F1-score.

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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