arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.07105cs.CLcs.IR
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ZeroShotCeres:半结构化网页的Zero-Shot关系抽取

ZeroShotCeres: Zero-Shot Relation Extraction from Semi-Structured Webpages

University of Washington(华盛顿大学);Amazon(亚马逊);Allen Institute for AI(艾伦人工智能研究所)

Colin Lockard, Prashant Shiralkar, Xin Luna Dong, Hannaneh Hajishirzi

摘要:

在诸如半结构化网页的许多文档中,文本语义通过使用包括布局、字体大小和颜色的视觉元素传达的附加信息来增强。关于从半结构化网站中提取信息抽取的先前工作需要经由来自该模板的手动标记或远程监督的数据来学习特定于给定模板的提取模型。在这项工作中,我们提出了一个解决方案,“zero-shot”开放域关系抽取从网页与以前看不见的模板,包括从网站与现有的知识来源很少重叠的远程监督和网站在全新的主题垂直。我们的模型使用基于图神经网络的方法来构建网页上文本字段的丰富表示以及它们之间的关系,从而能够泛化到新的模板。实验表明,该方法提供了一个31%的F1增益超过基线的zero-shot提取在一个新的主题垂直。

英文摘要:

In many documents, such as semi-structured webpages, textual semantics are augmented with additional information conveyed using visual elements including layout, font size, and color. Prior work on information extraction from semi-structured websites has required learning an extraction model specific to a given template via either manually labeled or distantly supervised data from that template. In this work, we propose a solution for "zero-shot" open-domain relation extraction from webpages with a previously unseen template, including from websites with little overlap with existing sources of knowledge for distant supervision and websites in entirely new subject verticals. Our model uses a graph neural network-based approach to build a rich representation of text fields on a webpage and the relationships between them, enabling generalization to new templates. Experiments show this approach provides a 31% F1 gain over a baseline for zero-shot extraction in a new subject vertical.

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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