arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2109.03322cs.CL
收藏

基于语料库的开放域事件类型归纳

Corpus-based Open-Domain Event Type Induction

University of Illinois Urbana-Champaign(伊利诺伊大学厄巴纳-香槟分校)

Jiaming Shen, Yunyi Zhang, Heng Ji, Jiawei Han

摘要:

传统的事件提取方法需要预定义的事件类型及其相应的注释来学习事件提取器。这些先决条件在实际应用中往往难以满足。本文提出了一种基于语料库的开放域事件类型归纳方法,该方法可以从给定的语料库中自动发现一组事件类型。由于同一类型的事件可以用多种方式表示,我们建议将每个事件类型表示为一组<谓词意义,对象头部>对。具体来说,我们的方法(1)选择显着的谓词和对象中心语,(2)消除歧义的谓词意义只使用一个动词意义词典,(3)获得事件类型的联合嵌入和聚类<谓词意义,对象中心语>对在潜在的球形空间。我们在来自不同领域的三个数据集上的实验表明,我们的方法可以根据自动和人工评估发现突出和高质量的事件类型。

英文摘要:

Traditional event extraction methods require predefined event types and their corresponding annotations to learn event extractors. These prerequisites are often hard to be satisfied in real-world applications. This work presents a corpus-based open-domain event type induction method that automatically discovers a set of event types from a given corpus. As events of the same type could be expressed in multiple ways, we propose to represent each event type as a cluster of <predicate sense, object head> pairs. Specifically, our method (1) selects salient predicates and object heads, (2) disambiguates predicate senses using only a verb sense dictionary, and (3) obtains event types by jointly embedding and clustering <predicate sense, object head> pairs in a latent spherical space. Our experiments, on three datasets from different domains, show our method can discover salient and high-quality event types, according to both automatic and human evaluations.

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。

↑