Chava Laufer
Author directory2026
Team JCT 2026 at SemEval-2026 Task 5: AmbiStory Navigating Narrative Consistency through a Hybrid LLM-NLI Ensemble
Chava Laufer | Batel Turjeman | Chaya Liebeskind
Proceedings of the 20th International Workshop on Semantic Evaluation (2026)
Chava Laufer | Batel Turjeman | Chaya Liebeskind
Proceedings of the 20th International Workshop on Semantic Evaluation (2026)
The system integrates a generative Large Language Model (Llama-3 8B, fine-tuned via LoRA) with a dual-expert bidirectional cross-encoder (DeBERTa-v3-large) optimized for both semantic similarity and Natural Language Inference (NLI). By aggregating these complementary models, the system effectively captures complex contextual dependencies. In the official test set, our architecture ranked 22nd out of 79 systems, achieving a Spearman Rank Correlation of 0.71 and an accuracy within the standard deviation of 82.04%.