Guessing the grammatical function of a non-root f-structure in LFG

  • Authors:
  • Anton Bryl;Josef van Genabith;Yvette Graham

  • Affiliations:
  • Dublin City University, Dublin, Ireland;Dublin City University, Dublin, Ireland;Dublin City University, Dublin, Ireland

  • Venue:
  • IWPT '09 Proceedings of the 11th International Conference on Parsing Technologies
  • Year:
  • 2009

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Abstract

Lexical-Functional Grammar (Kaplan and Bresnan, 1982) f-structures are bilexical labelled dependency representations. We show that the Naive Bayes classifier is able to guess missing grammatical function labels (i.e. bilexical dependency labels) with reasonably high accuracy (82--91%). In the experiments we use f-structure parser output for English and German Europarl data, automatically "broken" by replacing grammatical function labels with a generic UNKNOWN label and asking the classifier to restore the label.