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Treebank Annotation Schemes and Parser Evaluation for German

  • Recent studies focussed on the question whether less-configurational languages like German are harder to parse than English, or whether the lower parsing scores are an artefact of treebank encoding schemes and data structures, as claimed by Kübler et al. (2006). This claim is based on the assumption that PARSEVAL metrics fully reflect parse quality across treebank encoding schemes. In this paper we present new experiments to test this claim. We use the PARSEVAL metric, the Leaf-Ancestor metric as well as a dependency-based evaluation, and present novel approaches measuring the effect of controlled error insertion on treebank trees and parser output. We also provide extensive past-parsing crosstreebank conversion. The results of the experiments show that, contrary to Kübler et al. (2006), the question whether or not German is harder to parse than English remains undecided.

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Author:Ines Rehbein, Josef van Genabith
Parent Title (English):Proceedings of the 2007 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning. Prague, Czech Republic. June 28-30, 2007
Publisher:Association for Computational Linguistics
Place of publication:Stroudsburg, PA
Document Type:Conference Proceeding
Year of first Publication:2007
Date of Publication (online):2017/01/09
Tag:parser evaluation
GND Keyword:Annotation; Korpus <Linguistik>; Syntaktische Analyse
First Page:630
Last Page:639
DDC classes:400 Sprache / 430 Deutsch
Open Access?:ja
Licence (German):License LogoUrheberrechtlich geschützt