Paper: Model-Portability Experiments for Textual Temporal Analysis

ACL ID P11-2047
Title Model-Portability Experiments for Textual Temporal Analysis
Venue Annual Meeting of the Association of Computational Linguistics
Session Main Conference
Year 2011

We explore a semi-supervised aproach for improving the portability of time expresion recognition to non-newswire domains: we generate additional training examples by substituting temporal expression words with potential synonyms. We explore using synonyms both from ordNet and from the Latent Words Language Model (LWLM), which predicts synonyms in context using an unsupervised approach. We evaluate a state-of-the-art time expression recognition system trained both with and without the additional training examples using data from TempEval 2010, Reuters and Wikipedia. We find that the LWLM provides substan- tial improvements on the Reuters corpus, and smaller improvements on the Wikipedia corpus. We find that WordNet alone never improves performance, though intersecting the...