KostasThesis2025 at SemEval-2025 Task 10 Subtask 2: A Continual Learning Approach to Propaganda Analysis in Online News

Konstantinos Eleftheriou, Panos Louridas, John Pavlopoulos


Abstract
In response to the growing challenge of propagandistic presence through online media inonline news, the increasing need for automated systems that are able to identify and classify narrative structures in multiple languages is evident. We present our approach to the SemEval-2025 Task 10 Subtask 2, focusing on the challenge of hierarchical multi-label, multi-class classification in multilingual news articles. We present methods to handle long articles with respect to how they are naturally structured in the dataset, propose a hierarchical classification neural network model with respect to the taxonomy, and a continual learning training approach that leverages cross-lingual knowledge transfer.
Anthology ID:
2025.semeval-1.122
Volume:
Proceedings of the 19th International Workshop on Semantic Evaluation (SemEval-2025)
Month:
July
Year:
2025
Address:
Vienna, Austria
Editors:
Sara Rosenthal, Aiala Rosá, Debanjan Ghosh, Marcos Zampieri
Venues:
SemEval | WS
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
899–908
Language:
URL:
https://preview.aclanthology.org/transition-to-people-yaml/2025.semeval-1.122/
DOI:
Bibkey:
Cite (ACL):
Konstantinos Eleftheriou, Panos Louridas, and John Pavlopoulos. 2025. KostasThesis2025 at SemEval-2025 Task 10 Subtask 2: A Continual Learning Approach to Propaganda Analysis in Online News. In Proceedings of the 19th International Workshop on Semantic Evaluation (SemEval-2025), pages 899–908, Vienna, Austria. Association for Computational Linguistics.
Cite (Informal):
KostasThesis2025 at SemEval-2025 Task 10 Subtask 2: A Continual Learning Approach to Propaganda Analysis in Online News (Eleftheriou et al., SemEval 2025)
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https://preview.aclanthology.org/transition-to-people-yaml/2025.semeval-1.122.pdf