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Extracting and Structuring Open Relations from Portuguese Text

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Computational Processing of the Portuguese Language (PROPOR 2016)

Part of the book series: Lecture Notes in Computer Science ((LNAI,volume 9727))

Abstract

The task of Open Relation Extraction from texts faces many challenges, considering the required linguistic knowledge and the sophistication of the language processing techniques employed. This paper presents the extraction and structuring of open relations between named entities from Portuguese texts. We apply the Conditional Random Fields model for the extraction of relation descriptors between named entities belonging to Person, Place and Organisation categories. A 0.64 of F-measure was reached as a result. To make better sense of the output, we structure the extracted relation descriptors using mining configurations.

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Notes

  1. 1.

    Recognition of Relation between Named Entities.

  2. 2.

    http://www.nltk.org/.

  3. 3.

    http://mallet.cs.umass.edu/.

  4. 4.

    It is worth noting that preposition-article contraction is split (“da”, “do” changes to “de + a”, “de + o”).

  5. 5.

    http://www.linguateca.pt/harem/.

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Acknowledgments

We thank the CNPQ, CAPES and FAPERGS for their financial support.

Author information

Authors and Affiliations

  1. Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil

    Sandra Collovini & Gabriel Machado

  2. Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil

    Renata Vieira

Authors
  1. Sandra Collovini
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  2. Gabriel Machado
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  3. Renata Vieira
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Corresponding author

Correspondence to Sandra Collovini .

Editor information

Editors and Affiliations

  1. Universidade de Lisbon, Portugal

    João Silva

  2. ISCTE-IUL, Lisbon, Portugal

    Ricardo Ribeiro

  3. Universidade de Évora, Évora, Portugal

    Paulo Quaresma

  4. Universidade de Caxias do Sul, Caxias do Suö, Brazil

    André Adami

  5. Universidade de Lisbon, Lisboa, Portugal

    António Branco

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Collovini, S., Machado, G., Vieira, R. (2016). Extracting and Structuring Open Relations from Portuguese Text. In: Silva, J., Ribeiro, R., Quaresma, P., Adami, A., Branco, A. (eds) Computational Processing of the Portuguese Language. PROPOR 2016. Lecture Notes in Computer Science(), vol 9727. Springer, Cham. https://doi.org/10.1007/978-3-319-41552-9_16

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  • DOI: https://doi.org/10.1007/978-3-319-41552-9_16

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-41551-2

  • Online ISBN: 978-3-319-41552-9

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