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SkipCor: Skip-Mention Coreference Resolution Using Linear-Chain Conditional Random Fields

Author

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  • Slavko Žitnik
  • Lovro Šubelj
  • Marko Bajec

Abstract

Coreference resolution tries to identify all expressions (called mentions) in observed text that refer to the same entity. Beside entity extraction and relation extraction, it represents one of the three complementary tasks in Information Extraction. In this paper we describe a novel coreference resolution system SkipCor that reformulates the problem as a sequence labeling task. None of the existing supervised, unsupervised, pairwise or sequence-based models are similar to our approach, which only uses linear-chain conditional random fields and supports high scalability with fast model training and inference, and a straightforward parallelization. We evaluate the proposed system against the ACE 2004, CoNLL 2012 and SemEval 2010 benchmark datasets. SkipCor clearly outperforms two baseline systems that detect coreferentiality using the same features as SkipCor. The obtained results are at least comparable to the current state-of-the-art in coreference resolution.

Suggested Citation

  • Slavko Žitnik & Lovro Šubelj & Marko Bajec, 2014. "SkipCor: Skip-Mention Coreference Resolution Using Linear-Chain Conditional Random Fields," PLOS ONE, Public Library of Science, vol. 9(6), pages 1-14, June.
    • Handle: RePEc:plo:pone00:0100101
    DOI: 10.1371/journal.pone.0100101
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