Paper: Evita: A Robust Event Recognizer For QA Systems

ACL ID H05-1088
Title Evita: A Robust Event Recognizer For QA Systems
Venue Conference on Empirical Methods in Natural Language Processing
Session Main Conference
Year 2005

We present Evita, an application for rec- ognizing events in natural language texts. Although developed as part of a suite of tools aimed at providing question answer- ing systems with information about both temporal and intensional relations among events, it can be used independently as an event extraction tool. It is unique in that it is not limited to any pre-established list of relation types (events), nor is it re- stricted to a specific domain. Evita per- forms the identification and tagging of event expressions based on fairly simple strategies, informed by both linguistic- and statistically-based data. It achieves a performance ratio of 80.12% F-measure.