3 papers
cs.CL2026
QuadAI at SemEval-2026 Task 3: Ensemble Learning of Hybrid RoBERTa and LLMs for Dimensional Aspect-Based Sentiment Analysis
A. J. W. de Vink, Filippos Karolos Ventirozos, Natalia Amat-Lefort +1
We present our system for SemEval-2026 Task 3 on dimensional aspect-based sentiment regression. Our approach combines a hybrid RoBERTa encoder, which jointly predicts sentiment usi…
cs.CL2025
Exploring Zero-Shot ACSA with Unified Meaning Representation in Chain-of-Thought Prompting
Filippos Ventirozos, Peter Appleby, Matthew Shardlow
Aspect-Category Sentiment Analysis (ACSA) provides granular insights by identifying specific themes within reviews and their associated sentiment. While supervised learning approac…
cs.CL2025
Are You Sure You're Positive? Consolidating Chain-of-Thought Agents with Uncertainty Quantification for Aspect-Category Sentiment Analysis
Filippos Ventirozos, Peter Appleby, Matthew Shardlow
Aspect-category sentiment analysis provides granular insights by identifying specific themes within product reviews that are associated with particular opinions. Supervised learnin…