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International Conference on Computational Processing of the Portuguese Language

PROPOR 2018: Computational Processing of the Portuguese Language pp 375–384Cite as

Finding Opinion Targets in News Comments and Book Reviews

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Part of the book series: Lecture Notes in Computer Science ((LNAI,volume 11122))

Abstract

In this paper we approach the extraction of opinion targets in user-generated texts written in Portuguese in two different domains: political news articles and books. The former was represented by SentiCorpus-PT, and the latter by ReLi. We implemented and tested five prototypes for extracting explicit opinion targets from the corpora: one based on Centering, one based on morphosyntactic patterns, and three based on syntactic and morphosyntactic heuristics, which were used as baselines. Experimental results proved target extraction on ReLi to be a more difficult task than on SentiCorpus-PT, probably due to its low proportion of targets per sentence. Also, the baseline based on proper nouns performed better on SentiCorpus-PT, showing that superficial heuristics may yield good results in this domain.

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Notes

  1. 1.

    http://dmir.inesc-id.pt/project/SentiCorpus-PT_01_in_English.

  2. 2.

    https://www.linguateca.pt/Repositorio/ReLi/.

  3. 3.

    http://ccsl.ime.usp.br/redmine/projects/cogroo/wiki/API%20CoGrOO%204x.

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Acknowledgements

We would like to thank Araucária, State of Paraná Research Foundation, for the financial support.

Author information

Authors and Affiliations

  1. State University of Maringá, Maringá, PR, Brazil

    Leonardo Gabiato Catharin & Valéria Delisandra Feltrim

Authors
  1. Leonardo Gabiato Catharin
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  2. Valéria Delisandra Feltrim
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Corresponding authors

Correspondence to Leonardo Gabiato Catharin or Valéria Delisandra Feltrim .

Editor information

Editors and Affiliations

  1. Institute of Informatics, Federal University of Rio Grande do Sul, Porto Alegre, Brazil

    Aline Villavicencio

  2. Instituto de Informática - UFRGS, Porto Alegre, Brazil

    Viviane Moreira

  3. INESC-ID, Lisbon, Portugal

    Alberto Abad

  4. UFSCAR, Sao Carlos, Brazil

    Helena Caseli

  5. Centro Singular de Investigación en Tecnoloxías, Universidade de Santiago de Compostela, Santiago de Compostela, La Coruña, Spain

    Pablo Gamallo

  6. Université de Toulon, Parc Scientifique Technologique Luminy, Marseille, France

    Carlos Ramisch

  7. Centro de Informática e Sistemas, Universidade de Coimbra, Coimbra, Portugal

    Hugo Gonçalo Oliveira

  8. Federal University of Technology, Dois Vizinhos, Paraná, Brazil

    Gustavo Henrique Paetzold

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Catharin, L.G., Feltrim, V.D. (2018). Finding Opinion Targets in News Comments and Book Reviews. In: Villavicencio, A., et al. Computational Processing of the Portuguese Language. PROPOR 2018. Lecture Notes in Computer Science(), vol 11122. Springer, Cham. https://doi.org/10.1007/978-3-319-99722-3_38

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  • DOI: https://doi.org/10.1007/978-3-319-99722-3_38

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-99721-6

  • Online ISBN: 978-3-319-99722-3

  • eBook Packages: Computer ScienceComputer Science (R0)

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