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        <title>Hierarchical Word Structure-based Parsing: A Feasibility Study on UD-style Dependency Parsing in Japanese</title>
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    <name type="personal">
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    <abstract>In applying word-based dependency parsing such as Universal Dependencies (UD) to Japanese, the uncertainty of word segmentation emerges for defining a word unit of the dependencies. We introduce the following hierarchical word structures to dependency parsing in Japanese: morphological units (a short unit word, SUW) and syntactic units (a long unit word, LUW). An SUW can be used to segment a sentence consistently, while it is too short to represent syntactic construction. An LUW is a unit including functional multiwords and LUW-based analysis facilitates the capturing of syntactic structure and makes parsing results more precise than SUW-based analysis. This paper describes the results of a feasibility study on the ability and the effectiveness of parsing methods based on hierarchical word structure (LUW chunking+parsing) in comparison to single layer word structure (SUW parsing). We also show joint analysis of LUW-chunking and dependency parsing improves the performance of identifying predicate-argument structures, while there is not much difference between overall results of them. not much difference between overall results of them.</abstract>
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%0 Conference Proceedings
%T Hierarchical Word Structure-based Parsing: A Feasibility Study on UD-style Dependency Parsing in Japanese
%A Tanaka, Takaaki
%A Hayashi, Katsuhiko
%A Nagata, Masaaki
%Y Miyao, Yusuke
%Y Sagae, Kenji
%S Proceedings of the 15th International Conference on Parsing Technologies
%D 2017
%8 September
%I Association for Computational Linguistics
%C Pisa, Italy
%F tanaka-etal-2017-hierarchical
%X In applying word-based dependency parsing such as Universal Dependencies (UD) to Japanese, the uncertainty of word segmentation emerges for defining a word unit of the dependencies. We introduce the following hierarchical word structures to dependency parsing in Japanese: morphological units (a short unit word, SUW) and syntactic units (a long unit word, LUW). An SUW can be used to segment a sentence consistently, while it is too short to represent syntactic construction. An LUW is a unit including functional multiwords and LUW-based analysis facilitates the capturing of syntactic structure and makes parsing results more precise than SUW-based analysis. This paper describes the results of a feasibility study on the ability and the effectiveness of parsing methods based on hierarchical word structure (LUW chunking+parsing) in comparison to single layer word structure (SUW parsing). We also show joint analysis of LUW-chunking and dependency parsing improves the performance of identifying predicate-argument structures, while there is not much difference between overall results of them. not much difference between overall results of them.
%U https://aclanthology.org/W17-6308
%P 56-60

Markdown (Informal)

[Hierarchical Word Structure-based Parsing: A Feasibility Study on UD-style Dependency Parsing in Japanese](https://aclanthology.org/W17-6308) (Tanaka et al., IWPT 2017)

• Hierarchical Word Structure-based Parsing: A Feasibility Study on UD-style Dependency Parsing in Japanese (Tanaka et al., IWPT 2017)

ACL

• Takaaki Tanaka, Katsuhiko Hayashi, and Masaaki Nagata. 2017. Hierarchical Word Structure-based Parsing: A Feasibility Study on UD-style Dependency Parsing in Japanese. In Proceedings of the 15th International Conference on Parsing Technologies, pages 56–60, Pisa, Italy. Association for Computational Linguistics.