TY  - UNPD
A1  - Schilder, Frank
A1  - Versley, Yannick
A1  - Habel, Christopher
T1  - Extracting spatial information : grounding, classifying and linking spatial expressions
N2  - 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.
Y1  - 2004
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/9959
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-1111512
UR  - http://www.versley.de/schilder-geoir04.pdf
N1  - Präsentiert auf dem Workshop on Geographic Information Retrieval, SIGIR 2004 in Sheffield between July the 25th and 29th
ER  -