A latent variable model of synchronous parsing for syntactic and semantic dependencies

  • Authors:
  • James Henderson;Paola Merlo;Gabriele Musillo;Ivan Titov

  • Affiliations:
  • Univ Geneva;Univ Geneva;Univ Geneva;Univ Illinois at U-C

  • Venue:
  • CoNLL '08 Proceedings of the Twelfth Conference on Computational Natural Language Learning
  • Year:
  • 2008

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Abstract

We propose a solution to the challenge of the CoNLL 2008 shared task that uses a generative history-based latent variable model to predict the most likely derivation of a synchronous dependency parser for both syntactic and semantic dependencies. The submitted model yields 79.1% macro-average F1 performance, for the joint task, 86.9% syntactic dependencies LAS and 71.0% semantic dependencies F1. A larger model trained after the deadline achieves 80.5% macro-average F1, 87.6% syntactic dependencies LAS, and 73.1% semantic dependencies F1.