@InProceedings{gotou-nishikawa-tokunaga:2016:ALR12,
  author    = {Gotou, Daiki  and  Nishikawa, Hitoshi  and  Tokunaga, Takenobu},
  title     = {An extension of ISO-Space for annotating object direction},
  booktitle = {Proceedings of the 12th Workshop on Asian Language Resources (ALR12)},
  month     = {December},
  year      = {2016},
  address   = {Osaka, Japan},
  publisher = {The COLING 2016 Organizing Committee},
  pages     = {1--9},
  abstract  = {In this paper, we extend an existing annotation scheme ISO-Space for annotating
	necessary spatial information for the task placing an specified object at a
	specified location with a specified direction according to a natural language
	instruction. We call such task the spatial placement problem. Our extension
	particularly focuses on describing the object direction, when the object is
	placed on the 2D plane. We conducted an annotation experiment in which a corpus
	of 20 situated dialogues were annotated. The annotation result showed the
	number of newly introduced tags by our proposal is not negligible. We also
	implemented an analyser that automatically assigns the proposed tags to the
	corpus and evaluated its performance. The result showed that the performance
	for entity tag was quite high ranging from 0.68 to 0.99 in F-measure, but not
	the case for relation tags, i.e. less than 0.4 in F-measure.},
  url       = {http://aclweb.org/anthology/W16-5401}
}