@InProceedings{tanaka-hayashi-nagata:2017:IWPT,
  author    = {Tanaka, Takaaki  and  Hayashi, Katsuhiko  and  Nagata, Masaaki},
  title     = {Hierarchical Word Structure-based Parsing: A Feasibility Study on UD-style Dependency Parsing in Japanese},
  booktitle = {Proceedings of the 15th International Conference on Parsing Technologies},
  month     = {September},
  year      = {2017},
  address   = {Pisa, Italy},
  publisher = {Association for Computational Linguistics},
  pages     = {56--60},
  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.},
  url       = {http://www.aclweb.org/anthology/W17-6308}
}