Paper: Identifying Patterns for Unsupervised Grammar Induction

ACL ID W10-2905
Title Identifying Patterns for Unsupervised Grammar Induction
Venue International Conference on Computational Natural Language Learning
Session Main Conference
Year 2010

This paper describes a new method for un- supervised grammar induction based on the automatic extraction of certain pat- terns in the texts. Our starting hypoth- esis is that there exist some classes of words that function as separators, mark- ing the beginning or the end of new con- stituents. Among these separators we dis- tinguish those which trigger new levels in the parse tree. If we are able to detect these separators we can follow a very simple procedure to identify the constituents of a sentence by taking the classes of words be- tween separators. This paper is devoted to describe the process that we have followed to automatically identify the set of sepa- rators from a corpus only annotated with Part-of-Speech (POS) tags. The proposed approach has allowed us to improve the re- sul...