Agata Cybulska, Piek Vossen

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Historical Event Extraction from Text. Agata Cybulska, Piek Vossen Computational Lexicology and Terminology Lab, Faculty of Arts, Free University Amsterdam. ACL LaTeCH 2011. Museum Application of the Historical Event Extraction Module. - PowerPoint PPT Presentation

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Agata Cybulska, Piek Vossen Computational Lexicology and Terminology Lab, Faculty of Arts, Free University AmsterdamHistorical Event Extraction from TextACL LaTeCH 2011Semantics of History November 2009Museum Application of the Historical Event Extraction Module Browsing exhibits of the Rijksmuseum through historical events eg.photos related to the Bosnian War and moreACL LaTeCH 2011LocationParticipantsTimeActionsModeling Historical Events in TextHISTORICALEVENTSrebrenicaBosnian soldiersMoslim man and boysOn 11 July 1995murderMuseum Application of the Historical Event Extraction Module Browsing exhibits of the Rijksmuseum through historical events eg.- photos related to the Bosnian War- art pieces referring to a president, general etc.- within a time periode- geographic area-> inferences aboutevent parts-> relations between eventsACL LaTeCH 2011*Development of the Historical Event Extraction ModuleNo annotated data available Our approach - development set of (only!) 5 texts manually annotated with Historical EventsEvent extraction based on patterns of structural and semantic propertiesACL LaTeCH 2011*Comparison with an evaluation set tagged by two Independent annotatorsEvaluation ResultsActions extracted with 67.94% recall and 51.96% precisionACL LaTeCH 2011MeasurementRelationsGold Standard TripletsSystem TripletsCorrect System TripletsRecall %Precision %Time17201376%65%Location31231032%43%Participant98955758%60%How did we manage to achieve such good resultsusing only a very limited set of annotated data?ACL LaTeCH 2011How did we do it ??*ACL LaTeCH 2011Come to our poster to find out more!ak.cybulska@let.vu.nl

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