Spectral learning for non-deterministic dependency parsing

  • Authors:
  • Franco M. Luque;Ariadna Quattoni;Borja Balle;Xavier Carreras

  • Affiliations:
  • Universidad Nacional de Córdoba and CONICET Córdoba, Argentina;Universitat Politècnica de Catalunya Barcelona;Universitat Politècnica de Catalunya Barcelona;Universitat Politècnica de Catalunya Barcelona

  • Venue:
  • EACL '12 Proceedings of the 13th Conference of the European Chapter of the Association for Computational Linguistics
  • Year:
  • 2012

Quantified Score

Hi-index 0.00

Visualization

Abstract

In this paper we study spectral learning methods for non-deterministic split head-automata grammars, a powerful hidden-state formalism for dependency parsing. We present a learning algorithm that, like other spectral methods, is efficient and non-susceptible to local minima. We show how this algorithm can be formulated as a technique for inducing hidden structure from distributions computed by forward-backward recursions. Furthermore, we also present an inside-outside algorithm for the parsing model that runs in cubic time, hence maintaining the standard parsing costs for context-free grammars.