arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2010.09189cs.CLcs.IR
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基于强化学习的知识引导开放属性值抽取

Knowledge-guided Open Attribute Value Extraction with Reinforcement Learning

North Carolina State University(北卡罗来纳州立大学);Fudan University(复旦大学)

Ye Liu, Sheng Zhang, Rui Song, Suo Feng, Yanghua Xiao

摘要:

面向新实体的开放属性值抽取是一项重要而又具有挑战性的任务。许多以前的工作制定的问题作为一个\textit{question-answering}(QA)的任务。虽然来自网络语料库的文章集合提供了关于新兴实体的更新信息,但检索到的文本可能是嘈杂的,不相关的,从而导致不准确的答案。有效地过滤掉噪声文章以及糟糕的答案是提高抽取准确率的关键。知识图谱(KG)包含关于实体的丰富的、组织良好的信息,为解决这一挑战提供了良好的资源。在这项工作中,我们提出了一个知识引导的强化学习(RL)框架的开放属性值提取。根据KG中的相关知识,我们训练了一个深度Q网络来顺序比较提取的答案,以提高提取的准确性。该框架适用于不同的信息抽取系统。我们的实验结果表明,我们的方法优于基线的16.5 - 27.8%。

英文摘要:

Open attribute value extraction for emerging entities is an important but challenging task. A lot of previous works formulate the problem as a \textit{question-answering} (QA) task. While the collections of articles from web corpus provide updated information about the emerging entities, the retrieved texts can be noisy, irrelevant, thus leading to inaccurate answers. Effectively filtering out noisy articles as well as bad answers is the key to improving extraction accuracy. Knowledge graph (KG), which contains rich, well organized information about entities, provides a good resource to address the challenge. In this work, we propose a knowledge-guided reinforcement learning (RL) framework for open attribute value extraction. Informed by relevant knowledge in KG, we trained a deep Q-network to sequentially compare extracted answers to improve extraction accuracy. The proposed framework is applicable to different information extraction system. Our experimental results show that our method outperforms the baselines by 16.5 - 27.8\%.

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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