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arXiv 1707.07591cs.CL
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基于转换的抽象意义表示生成

Transition-Based Generation from Abstract Meaning Representations

Timo Schick

摘要:

这项工作解决了从抽象意义表示(AMR)图生成英语句子的任务。为了完成这个任务,我们将每个输入AMR图转换成一个类似于依赖树的结构,并通过对它应用各种预定义的动作来用语法信息对其进行注释。随后,通过以特定顺序访问其节点,从这个树结构中获得一个句子。我们训练最大熵模型来估计每个单独动作的概率,并设计一种算法,有效地逼近要应用的最佳动作序列。使用不合格的语言模型,我们的生成器在LDC 2014 T12测试集上获得了27.4的Bleu分数,这是迄今为止在不使用来自另一语料库的银标准注释作为额外训练数据的情况下报告的最佳结果。

英文摘要:

This work addresses the task of generating English sentences from Abstract Meaning Representation (AMR) graphs. To cope with this task, we transform each input AMR graph into a structure similar to a dependency tree and annotate it with syntactic information by applying various predefined actions to it. Subsequently, a sentence is obtained from this tree structure by visiting its nodes in a specific order. We train maximum entropy models to estimate the probability of each individual action and devise an algorithm that efficiently approximates the best sequence of actions to be applied. Using a substandard language model, our generator achieves a Bleu score of 27.4 on the LDC2014T12 test set, the best result reported so far without using silver standard annotations from another corpus as additional training data.

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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