Does Universal Dependencies need a parsing representation? An investigation of English
Does Universal Dependencies need a parsing representation? An investigation of English
复制标题
通用依赖关系是否需要解析表示？
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Christopher D. Manning
中科院分区：
文献类型：
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作者：
Natalia Silveira;Christopher D. Manning
本文研究了在通用依赖中定义英语数据解析表示的可能性，通用依赖是一种跨语言依赖方案。我们研究改变依赖树中头部选择的结构转换。这些转换使助词、连词、从属连词和介词成为词头，而在d中，它们依赖于词汇词头。我们展示了MaltParser（一个数据驱动的基于转换的解析器）在每个转换的乘积上的性能的实验结果。虽然一些转换后的表示有利于提高性能，但是为了获得最终产品的UD而进行的反向转换会传播错误，部分原因是词法头表示的性质。这阻止了转换被有效地用于改进该表示中的解析器性能。
This paper investigates the potential of defining a parsing representation for English data in Universal Dependencies, a crosslingual dependency scheme. We investigate structural transformations that change the choices of headedness in the dependency tree. The transformations make auxiliaries, copulas, subordinating conjunctions and prepositions heads, while in UD they are dependents of a lexical head. We show experimental results for the performance of MaltParser, a data-driven transition-based parser, on the product of each transformation. While some transformed representations favor performance, inverting the transformations to obtain UD for the final product propagates errors, in part due to the nature of lexical-head representations. This prevents the transformations from being profitably used to improve parser performance in that representation.