%0 Conference Paper %1 piskorski2008 %A Piskorski, Jakub %A Tanev, Hristo %A Atkinson, Martin %A Goot, Erik Van Der %B Proceeding of the 2008 Conference on New Trends in Multimedia and Network Information Systems %D 2008 %I IOS Press %K bootstrap cross-document cross-lingual dataset_newsfeed dataset_own event_extraction event_unification onlinedemo %P 276--290 %T Cluster-Centric Approach to News Event Extraction %@ 978-1-58603-904-2

@inproceedings{piskorski2008, added-at = {2009-10-22T15:19:15.000+0200}, author = {Piskorski, Jakub and Tanev, Hristo and Atkinson, Martin and Goot, Erik Van Der}, biburl = {https://www.bibsonomy.org/bibtex/2753a4f254965c095e14695c05d231936/jnothman}, booktitle = {Proceeding of the 2008 Conference on New Trends in Multimedia and Network Information Systems}, description = {Multilingual event extraction system focussing on clustered first sentences of news articles. Focus on violent and natural disaster events: date, location, number killed and injured, actors, kidnapped people, type of event. Realtime hierarchical clustering of news (bag of words vector cosine, with some entropy-based stopwording, from the first 200 worsd). Clusters and individual articles are geolocated. Surface extraction and role-labelling grammars (manually built?) with language and domain-specific lexicons. Bootstrapped pattern acquisition with manual validation for each iteration. Event unification: - semantic roles merged according to reliability=type of extraction rules; - victim counting: votes with numerical similarity estimation; - event type classification: event types ranked according to occurrence of type-specific keywords in articles. Evaluation not sufficiently detailed.}, interhash = {ec27bfe389f3cc182016c54f902daef9}, intrahash = {753a4f254965c095e14695c05d231936}, isbn = {978-1-58603-904-2}, keywords = {bootstrap cross-document cross-lingual dataset_newsfeed dataset_own event_extraction event_unification onlinedemo}, pages = {276--290}, publisher = {IOS Press}, timestamp = {2009-10-22T15:19:15.000+0200}, title = {Cluster-Centric Approach to News Event Extraction}, year = 2008 }