Contextualized word representations have proven useful for various natural language processing tasks. However, it remains unclear to what extent these representations can cover hand-coded semantic information such as semantic frames, which specify the semantic role of the arguments associated with a predicate. In this paper, we focus on verbs that evoke different frames depending on the context, and we investigate how well contextualized word representations can recognize the difference of frames that the same verb evokes. We also explore which types of representation are suitable for semantic frame induction. In our experiments, we compare seven different contextualized word representations for two English frame-semantic resources, FrameNet and PropBank. We demonstrate that several contextualized word representations, especially BERT and its variants, are considerably informative for semantic frame induction. Furthermore, we examine the extent to which the contextualized representation of a verb can estimate the number of frames that the verb can evoke.
翻译:然而,目前还不清楚这些表达方式在多大程度上可以涵盖手码语义学信息,例如语义框架,其中具体说明了与上游相关的论点的语义作用。在本文中,我们侧重于根据上下文引用不同框架的动词,我们研究了背景化的字义表达方式如何能很好地认识到同一动词所引用的框架的不同。我们还探讨了哪些类型的表达方式适合用于语义框架的诱导。在我们的实验中,我们比较了两种英国框架语义资源(框架网和PropBank)的七个不同背景化的词义表达方式。我们表明,一些背景化的词表达方式,特别是生物伦理学及其变体,对于语义框架的引言具有相当丰富的信息。此外,我们研究了一个动词的背景化表达方式在多大程度上可以估计动词可以引用的框架数量。