Guessing the Grammatical Function of a Non-Root F-Structure in LFG

Anton Bryl, Josef van Genabith and Yvette Graham

11th International Conference on Parsing Technology (IWPT 2009)
Paris, France, 7th-9th October, 2009

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Summary

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.

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