SokraTUM at SemEval-2026 Task 3: A hybrid cascade of Label Distribution Learning, RAG supported generative extraction and contrastive metric learning for dimensional sentiment analysis

Denis Laschenko, Albert Korotyk


Abstract
The Dimensional ABSA (DimABSA) shared task extends traditional aspect-based sentiment analysis from categorical polarity to continuous valence–arousal (VA) prediction. We present our system for all three subtasks: Dimensional Aspect Sentiment Regression (DimASR), Dimensional Aspect Sentiment Triplet Extraction (DimASTE), and Dimensional Aspect Sentiment Quad Prediction (DimASQP). Due to the cascading nature of the different subtasks, we built a modular interlocking pipeline that uses classical Machine Learning and NLP methods. Experiments across domains show consistent gains in regression accuracy and structured extraction performance. Our results demonstrate the effectiveness of distribution-aware regression, retrieval-augmented generation, and contrastive prototype learning for dimensional sentiment analysis.
Anthology ID:
2026.semeval-1.241
Volume:
Proceedings of the 20th International Workshop on Semantic Evaluation (2026)
Month:
July
Year:
2026
Address:
San Diego, California, USA
Editors:
Ekaterina Kochmar, Debanjan Ghosh, Kai North, Mamoru Komachi
Venues:
SemEval | WS
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
1919–1929
Language:
URL:
https://preview.aclanthology.org/corrections-2026-07/2026.semeval-1.241/
DOI:
10.18653/v1/2026.semeval-1.241
Bibkey:
Cite (ACL):
Denis Laschenko and Albert Korotyk. 2026. SokraTUM at SemEval-2026 Task 3: A hybrid cascade of Label Distribution Learning, RAG supported generative extraction and contrastive metric learning for dimensional sentiment analysis. In Proceedings of the 20th International Workshop on Semantic Evaluation (2026), pages 1919–1929, San Diego, California, USA. Association for Computational Linguistics.
Cite (Informal):
SokraTUM at SemEval-2026 Task 3: A hybrid cascade of Label Distribution Learning, RAG supported generative extraction and contrastive metric learning for dimensional sentiment analysis (Laschenko & Korotyk, SemEval 2026)
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PDF:
https://preview.aclanthology.org/corrections-2026-07/2026.semeval-1.241.pdf
Supplementarymaterial:
 2026.semeval-1.241.SupplementaryMaterial.zip