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Discourse Anaphora and Anaphor Resolution Colloquium

DAARC 2011: Anaphora Processing and Applications pp 59–69Cite as

Can Projected Chains in Parallel Corpora Help Coreference Resolution?

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Part of the book series: Lecture Notes in Computer Science ((LNAI,volume 7099))

Abstract

The majority of current coreference resolution systems rely on annotated corpora to train classifiers for this task. However, this is possible only for languages for which annotated corpora are available. This paper presents a system that automatically extracts coreference chains from texts in Portuguese without the need for Portuguese corpora manually annotated with coreferential information. To achieve this, an English coreference resolver is run on the English part of an English-Portuguese parallel corpus. The coreference pairs identified by the resolver are projected to the Portuguese part of the corpus using automatic word alignment. These projected pairs are then used to train the coreference resolver for Portuguese. Evaluation of the system reveals that it does not outperform a head match baseline. This is due to the fact that most of the projected pairs have the same head, which is learnt by the Portuguese classifier. This suggests that a more accurate English coreference resolver is necessary. A better projection algorithm is also likely to improve the performance of the system.

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Author information

Authors and Affiliations

  1. Research Group in Computational Linguistics, University of Wolverhampton, Wolverhampton, UK

    José Guilherme Camargo de Souza & Constantin Orăsan

Authors
  1. José Guilherme Camargo de Souza
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  2. Constantin Orăsan
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Editor information

Editors and Affiliations

  1. Centro de Linguística da Universidade de Lisboa, Complexo Interdisciplinar da Universidade de Lisboa, Av. Prof. Gama Pinto, 2, 1649-003, Lisboa, Portugal

    Iris Hendrickx

  2. K. B. Chandrasekhar Research Centre, Anna University, MIT Campus of Anna University, Chromepet, 600044, Chennai, India

    Sobha Lalitha Devi

  3. Faculdade de Ciências, Departamento de Informática, Cidade Universitária, Universidade de Lisboa, 1749-016, Lisboa, Portugal

    António Branco

  4. School of Humanities, Languages and Social Studies, Research Group in Computational Linguistics, University of Wolverhampton, WV1 1SB, Wolverhampton, UK

    Ruslan Mitkov

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de Souza, J.G.C., Orăsan, C. (2011). Can Projected Chains in Parallel Corpora Help Coreference Resolution?. In: Hendrickx, I., Lalitha Devi, S., Branco, A., Mitkov, R. (eds) Anaphora Processing and Applications. DAARC 2011. Lecture Notes in Computer Science(), vol 7099. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-25917-3_6

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  • DOI: https://doi.org/10.1007/978-3-642-25917-3_6

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-25916-6

  • Online ISBN: 978-3-642-25917-3

  • eBook Packages: Computer ScienceComputer Science (R0)

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