arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1302.4813cs.CL
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概率框架归纳

Probabilistic Frame Induction

University of Toronto(多伦多大学);Microsoft Research(微软研究院)

Jackie Chi Kit Cheung, Hoifung Poon, Lucy Vanderwende

摘要:

在自然语言的话语中,相关的事件往往出现在彼此附近,以描述一个更大的场景。这样的结构可以通过框架的概念形式化(a.k.a.)。模板),它包括一组相关的事件和原型参与者以及事件转换。识别框架是信息抽取和自然语言生成的前提,通常是人工完成的。最近已经提出了用于诱导帧的方法,但是它们通常使用特设过程并且难以诊断或扩展。在本文中,我们提出了框架归纳的第一种概率方法,它将框架,事件,参与者作为潜在主题,并学习那些最能解释文本的框架和事件转换。帧的数量推断的一个新的应用程序的分裂合并方法从句法分析。在从文本到诱导框架和提取事实的端到端评估中,我们的方法产生了最先进的结果,同时大大减少了工程工作。

英文摘要:

In natural-language discourse, related events tend to appear near each other to describe a larger scenario. Such structures can be formalized by the notion of a frame (a.k.a. template), which comprises a set of related events and prototypical participants and event transitions. Identifying frames is a prerequisite for information extraction and natural language generation, and is usually done manually. Methods for inducing frames have been proposed recently, but they typically use ad hoc procedures and are difficult to diagnose or extend. In this paper, we propose the first probabilistic approach to frame induction, which incorporates frames, events, participants as latent topics and learns those frame and event transitions that best explain the text. The number of frames is inferred by a novel application of a split-merge method from syntactic parsing. In end-to-end evaluations from text to induced frames and extracted facts, our method produced state-of-the-art results while substantially reducing engineering effort.

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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