Experiments with corpus-based LFG specialization

  • Authors:
  • Nicola Cancedda;Christer Samuelsson

  • Affiliations:
  • Xerox Research Centre Europe, Meylan, France;Xerox Research Centre Europe, Meylan, France

  • Venue:
  • ANLC '00 Proceedings of the sixth conference on Applied natural language processing
  • Year:
  • 2000

Quantified Score

Hi-index 0.00

Visualization

Abstract

Sophisticated grammar formalisms, such as LFG, allow concisely capturing complex linguistic phenomena. The powerful operators provided by such formalisms can however introduce spurious ambiguity, making parsing inefficient. A simple form of corpus-based grammar pruning is evaluated experimentally on two wide-coverage grammars, one English and one French. Speedups of up to a factor 6 were obtained, at a cost in grammatical coverage of about 13%. A two-stage architecture allows achieving significant speedups without introducing additional parse failures.