Deep Learning Methods for Improving Event Extraction on Political and Social Science Studies

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dc.contributor.advisorKhan, Latifur
dc.contributor.advisorO, Kenneth K.
dc.contributor.committeeMemberWu, Weili
dc.contributor.committeeMemberBastani, Farokh B.
dc.contributor.committeeMemberBrandt, Patrick T.
dc.creatorSkorupa Parolin, Erick
dc.date.accessioned2022-11-29T21:27:07Z
dc.date.available2022-11-29T21:27:07Z
dc.date.created2022-05
dc.date.issued2022-05-01T05:00:00.000Z
dc.date.submittedMay 2022
dc.date.updated2022-11-29T21:27:08Z
dc.description.abstractPolitical and social scholars increasingly rely on event coders, which are automated systems that extract structured event representations from news articles, in order to monitor, ana- lyze and predict conflicts and affairs involving political entities across the globe. However, the existing event coders rest on outdated pattern matching techniques, relying on large manually maintained dictionaries composed of lexico-syntactic patterns designed for cap- turing conflict events. Apart from the high costs, time and specialized knowledge required to update and expand such dictionaries, these techniques do not support event extraction on multilingual corpus. As a consequence, the application of existing systems often yields low-recall results and imposes limitations when working with sources coming from different countries and languages. In this dissertation, we propose deep learning based frameworks to obtain state-of-the-art results for extracting structured events from natural language text in political and social sciences domains. We do so by exploring three main directions: (i) automatically extending the external dictionaries and knowledge bases utilized in the current event coders through knowledge extraction techniques; (ii) formulating the event coding task as a classification problem and proposing a supervised deep learning model to solve it; and (iii) developing an innovative deep neural network design by combining state-of-the-art lan- guage representation models with multi-task learning technique to efficiently extract events in a structured format from multilingual corpus. We demonstrate the superiority of our ap- proaches through conducting extensive experiments on real-world multilingual corpora based on political science and conflict domains.
dc.format.mimetypeapplication/pdf
dc.identifier.uri
dc.identifier.urihttps://hdl.handle.net/10735.1/9521
dc.language.isoen
dc.subjectComputer Science
dc.subjectPolitical Science, General
dc.titleDeep Learning Methods for Improving Event Extraction on Political and Social Science Studies
dc.typeThesis
dc.type.materialtext
thesis.degree.collegeSchool of Engineering and Computer Science
thesis.degree.departmentComputer Science
thesis.degree.grantorThe University of Texas at Dallas
thesis.degree.namePHD

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