Agata Cybulska, Piek Vossen Computational Lexicology and Terminology Lab, Faculty of Arts, Free University Amsterdam Historical Event Extraction from Text

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  • Agata Cybulska, Piek Vossen Computational Lexicology and Terminology Lab, Faculty of Arts, Free University AmsterdamHistorical Event Extraction from TextACL LaTeCH 2011

    Semantics of History November 2009

  • Museum 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 2011

  • LocationParticipantsTimeActionsModeling Historical Events in TextHISTORICALEVENTSrebrenicaBosnian soldiersMoslim man and boysOn 11 July 1995murder

  • Museum 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 Events

    Event extraction based on patterns of structural and semantic properties

    ACL LaTeCH 2011

  • *Comparison with an evaluation set tagged by two Independent annotators

    Evaluation ResultsActions extracted with 67.94% recall and 51.96% precisionACL LaTeCH 2011

    MeasurementRelationsGold 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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