Porting statistical parsers with data-defined kernels

  • Authors:
  • Ivan Titov;James Henderson

  • Affiliations:
  • University of Geneva, Genève, Switzerland;University of Edinburgh, Edinburgh, United Kingdom

  • Venue:
  • CoNLL-X '06 Proceedings of the Tenth Conference on Computational Natural Language Learning
  • Year:
  • 2006

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Abstract

Previous results have shown disappointing performance when porting a parser trained on one domain to another domain where only a small amount of data is available. We propose the use of data-defined kernels as a way to exploit statistics from a source domain while still specializing a parser to a target domain. A probabilistic model trained on the source domain (and possibly also the target domain) is used to define a kernel, which is then used in a large margin classifier trained only on the target domain. With a SVM classifier and a neural network probabilistic model, this method achieves improved performance over the probabilistic model alone.