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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2104.06969cs.CLcs.IR
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基于实体信息的问答事件检测

Event Detection as Question Answering with Entity Information

University of La Rochelle(拉罗谢尔大学);University of Toulouse(图卢兹大学)

Emanuela Boros, Jose G. Moreno, Antoine Doucet

摘要:

在本文中,我们提出了一个最近的和研究不足的范式的事件检测(ED)的任务,铸造它作为一个问答(QA)问题的可能性,多个答案和支持的实体。因此,事件触发器的提取被转换为从上下文识别答案跨度的任务,同时还关注周围的实体。该架构基于预训练和微调的语言模型,其中输入上下文通过在不同级别标记的实体、它们的位置、它们的类型以及最后的参数角色来增强。在ACE~2005语料库上的实验表明,该方法是一个可行的解决方案,它显着优于国家的最先进的模型。此外,我们证明了我们的方法也能够提取看不见的事件类型。

英文摘要:

In this paper, we propose a recent and under-researched paradigm for the task of event detection (ED) by casting it as a question-answering (QA) problem with the possibility of multiple answers and the support of entities. The extraction of event triggers is, thus, transformed into the task of identifying answer spans from a context, while also focusing on the surrounding entities. The architecture is based on a pre-trained and fine-tuned language model, where the input context is augmented with entities marked at different levels, their positions, their types, and, finally, the argument roles. Experiments on the ACE~2005 corpus demonstrate that the proposed paradigm is a viable solution for the ED task and it significantly outperforms the state-of-the-art models. Moreover, we prove that our methods are also able to extract unseen event types.

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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