CophiWue at SemEval-2026 Task 4: Symbolic Narrative Profiling with Taxonomy-Guided Extraction and Contrastive Fine-Tuning

Leonard Konle, Fotis Jannidis


Abstract
We present our system for SemEval-2026 Task 4, focusing primarily on Track B (narrative embedding). Our approach, the Decompose & Align Cycle, converts each story into a structured NarrativeProfile consisting of abstract themes, a five-step course of action, and an outcome. We then build a NarrativeTaxonomy from these initial extractions via agglomerative clustering, and use the resulting controlled vocabularies to guide a second extraction pass, producing terminologically standardized profiles across the full dataset. Finally, we contrastively fine-tune the Qwen3-Embedding8B model on profile text representations using TripletLoss, deriving story embeddings from this fine-tuned model. For Track A, we adapt the task’s provided baseline script by substituting Gemini 3 Pro as the judge, using the organizers default prompt on raw story texts.
Anthology ID:
2026.semeval-1.430
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:
3479–3484
Language:
URL:
https://preview.aclanthology.org/ingest-acl-workshops/2026.semeval-1.430/
DOI:
Bibkey:
Cite (ACL):
Leonard Konle and Fotis Jannidis. 2026. CophiWue at SemEval-2026 Task 4: Symbolic Narrative Profiling with Taxonomy-Guided Extraction and Contrastive Fine-Tuning. In Proceedings of the 20th International Workshop on Semantic Evaluation (2026), pages 3479–3484, San Diego, California, USA. Association for Computational Linguistics.
Cite (Informal):
CophiWue at SemEval-2026 Task 4: Symbolic Narrative Profiling with Taxonomy-Guided Extraction and Contrastive Fine-Tuning (Konle & Jannidis, SemEval 2026)
Copy Citation:
PDF:
https://preview.aclanthology.org/ingest-acl-workshops/2026.semeval-1.430.pdf
Supplementarymaterial:
 2026.semeval-1.430.SupplementaryMaterial.zip