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Recognition and normalisation of temporal expressions using conditional random fields and cascade of partial rules

  • Jan Kocoń EMAIL logo , Tomasz Bernaś and Marcin Oleksy
Published/Copyright: August 17, 2019

Abstract

This article introduces the issue of recognition and normalisation of temporal expressions for the Polish language. We describe what temporal information is and we present TimeML specification, adapted to Polish as a model for the description of temporal expressions. Classes of temporal expressions are presented as well as guidelines for annotation, normalisation of these expressions and our approach to corpus annotation and temporal expressions recognition. The key aspect of the work is the description of the features used for the recognition, the use of the method for selection and creation of feature templates for the model of Conditional Random Fields. We demonstrate the experiments and conclusions drawn from them.


Jan Kocoń Wrocław University of Science and Technology Wybrzeże Stanisława Wyspianskiego 27 50-370 Wrocław Poland

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9 Acknowledgements

Work financed as part of the investment in the CLARIN-PL research infrastructure funded by the Polish Ministry of Science and Higher Education.

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Published Online: 2019-08-17
Published in Print: 2019-06-26

© 2019 Faculty of English, Adam Mickiewicz University, Poznań, Poland

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