Semi-supervised dependency parsing using generalized tri-training

  • Authors:
  • Anders Søgaard;Christian Rishøj

  • Affiliations:
  • University of Copenhagen;University of Copenhagen

  • Venue:
  • COLING '10 Proceedings of the 23rd International Conference on Computational Linguistics
  • Year:
  • 2010

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Abstract

Martins et al. (2008) presented what to the best of our knowledge still ranks as the best overall result on the CONLL-X Shared Task datasets. The paper shows how triads of stacked dependency parsers described in Martins et al. (2008) can label unlabeled data for each other in a way similar to co-training and produce end parsers that are significantly better than any of the stacked input parsers. We evaluate our system on five datasets from the CONLL-X Shared Task and obtain 10--20% error reductions, incl. the best reported results on four of them. We compare our approach to other semi-supervised learning algorithms.