Extracting spatial information : grounding, classifying and linking spatial expressions

  • This paper is concerned with the tagging of spatial expressions in German newspaper articles, assigning a meaning to the expression and classifying the usages of the spatial expression and linking the derived referent to an event description. In our system, we implemented the activation of concepts in a very simple fashion, a concept is activated once (with a cost depending on the item that activated it) and is left activated thereafter. As an example, a city also activates the nodes for the region and the country it is part of, so that cities from one country are chosen over cities from different countries. A test corpus of 12 German newspaper articles was tested regarding several disambiguation strategies. Disambiguation was carried out via a beam search to find an approximately cost-optimal solution for the conflict set of potential grounding candidates for the tagged spatial expression. Test showed that the disambiguation strategies improved accuracy significantly.

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Author:Frank Schilder, Yannick Versley, Christopher Habel
Document Type:Working Paper
Year of Completion:2004
Year of first Publication:2004
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2008/11/04
Page Number:3
Präsentiert auf dem Workshop on Geographic Information Retrieval, SIGIR 2004 in Sheffield between July the 25th and 29th
Source:Arbeitspapier vom Workshop on Geographic Information Retrieval, 27th Annual International ACM SIGIR Conference ; http://www.versley.de/schilder-geoir04.pdf
Institutes:keine Angabe Fachbereich / Extern
Dewey Decimal Classification:4 Sprache / 40 Sprache / 400 Sprache
Linguistik-Klassifikation:Linguistik-Klassifikation: Computerlinguistik / Computational linguistics
Licence (German):License LogoDeutsches Urheberrecht