Determining the position of adverbial phrases in English.
NAACL-Short '09: Proceedings of Human Language Technologies: The 2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics, Companion Volume: Short Papers(2009)
摘要
In this paper we compare three approaches to adverbial positioning using lexical, syntactic, semantic and sentence-level features. We find that: (a), one- and two-stage classification-based approaches can achieve almost 86% accuracy in determining the absolute position of adverbials; (b) a classifier trained with only syntactic features gives performance close to that of a classifier trained with all features; and (c) a surface realizer incorporating a two-stage classifier for adverbial positioning as the second stage gives improvements of at least 10% in simple string accuracy over a baseline realizer for sentences containing adverbials.
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关键词
two-stage classifier,adverbial positioning,baseline realizer,simple string accuracy,surface realizer,syntactic feature,two-stage classification-based approach,absolute position,performance close,sentence-level feature,adverbial phrase
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