Paper: A Simple Ensemble Method for Hedge Identification

ACL ID W10-3021
Title A Simple Ensemble Method for Hedge Identification
Venue International Conference on Computational Natural Language Learning
Session Main Conference
Year 2010

We present in this paper a simple hedge identification method and its application on biomedical text. The problem at hand is a subtask of CoNLL-2010 shared task. Our solution consists of two classifiers, a statistical one and a CRF model, and a simple combination schema that combines their predictions. We report in detail on each component of our system and discuss the results. We also show that a more so- phisticated combination schema could im- prove the F-score significantly. 1 Problem definition The CoNLL-2010 Shared Task focused on the identification and localization of uncertain infor- mation and its scope in text. In the first task, a binary classification of sentences had to be per- formed, based on whether they are uncertain or not. The second task concentrated on the identi- fica...