James Hammerton, Miles Osborne, Susan Armstrong and Walter Daelemans

Memory-Based Shallow Parsing

Erik F. Tjong Kim Sang rikt@uia.ua.ac.be
CNTS - Language Technology Group
University of Antwerp
Universiteitsplein 1
B-2610 Wilrijk, Belgium

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Abstract:

We present memory-based learning approaches to shallow parsing and apply these to five tasks: base noun phrase identification, arbitrary base phrase recognition, clause detection, noun phrase parsing and full parsing. We use feature selection techniques and system combination methods for improving the performance of the memory-based learner. Our approach is evaluated on standard data sets and the results are compared with that of other systems. This reveals that our approach works well for base phrase identification while its application towards recognizing embedded structures leaves some room for improvement.