G22.2591 - Advanced Natural Language Processing - Spring 2004

Lecture 8

Term project:  send a topic by email by next week (April 5, 8 am).
Project is due by last class, May 3

Word Sense Disambiguation (WSD)

Using Parallel Corpora

Hwee Tou Ng, Bin Wang, and Yee Seng Chan.  Exploiting Parallel Texts for Word Sense Disambiguation:  An Empirical Study.  (ACL 2003).

Basic ideas:
Method for training a disambiguator for word w (based on Wordnet senses)
Evaluation

Bootstrapping approaches

Marti Hearst (1991) Noun Homograph Disambiguation using Local Context in Large Corpora

Presented by Heng Ji.

David Yarowsky (1995)  Unsupervised Word Sense Disambiguation Rivaling Supervised Methods (ACL 1995)

Presented by  Sonjia Waxmonsky

Ensemble methods

Dan Klein, Kristina Toutanova, H. Tolga Ilhan, Sepandar Kamvar, and Chirstopher Manning.  Combining Heterogenous Classifiers for Word-Sense Disambiguation.  Proc. SIGLEX Workshop, July 2002.

Presented by David Westbrook.