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The Portuguese B\(^2\)SG: A Semantic Test for Distributional Thesaurus

  • Rodrigo Wilkens
  • Leonardo Zilio
  • Eduardo Ferreira
  • Aline Villavicencio
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9727)

Abstract

The lack of availability of gold standards for evaluation of distributional thesauri is a stumbling block that prevents a direct comparison of alternative approaches in a uniform way. Here we present B\(^2\)SG, a TOEFL-like task for Portuguese that contains 2,875 tests with semantic relations (synonyms, antonyms and hypernyms) for nouns and verbs. The resource is validated by comparing it with lexical resources and by human judgment. The resource was used for evaluating two distributional thesauri: one built from lemmata and the other from surface forms. The evaluation of thesauri demonstrated that the use of lemmata is slightly more accurate than the use surface forms for building distributional thesauri. B\(^2\)SG is readily available for download (http://www.inf.ufrgs.br/pln/resource/B2SG.zip).

Keywords

Gold standard Semantic relations Distributional thesauri 

Notes

Acknowledgments

This research was partially developed in the context of the project Text Simplification of Complex Expressions, sponsored by Samsung Eletrônica da Amazônia Ltda., in the terms of the Brazilian law n. 8.248/91. This work was also partly supported by CNPq (482520/2012- 4, 312114/2015-0) and FAPERGS AiMWEst.

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Rodrigo Wilkens
    • 1
  • Leonardo Zilio
    • 1
  • Eduardo Ferreira
    • 1
  • Aline Villavicencio
    • 1
  1. 1.Institute of InformaticsUFRGSPorto AlegreBrazil

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