Christian Luna


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2025

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LATE-GIL-nlp at Semeval-2025 Task 10: Exploring LLMs and transformers for Characterization and extraction of narratives from online news
Ivan Diaz | Fredin Vázquez | Christian Luna | Aldair Conde | Gerardo Sierra | Helena Gómez - Adorno | Gemma Bel - Enguix
Proceedings of the 19th International Workshop on Semantic Evaluation (SemEval-2025)

This paper tackles SemEval~2025 Task~10, “Multilingual Characterization and Extraction of Narratives from Online News,” focusing on the Ukraine-Russia War and Climate Change domains. Our approach covers three subtasks: (1) {textbf{Entity Framing}}, assigning protagonist-antagonist-innocent roles with a prompt-based Llama~3.1~(8B) method; (2) {textbf{Narrative Classification}}, a multi-label classification using XLM-RoBERTa-base; and (3) {textbf{Narrative Extraction}}, generating concise, text-grounded explanations via FLAN-T5. Results show a unified multilingual transformer pipeline, combined with targeted preprocessing and fine-tuning, achieves substantial gains over baselines while effectively capturing complex narrative structures despite data imbalance and varied label distributions.