SemEval-2026 Task 12: Knowledge Graph with hyperbolic embedding in Abductive Event Reasoning

Mingkai Wang, Varun Ojha, Huizhi Liang


Abstract
This task introduces Abductive Event Reasoning (AER), a novel shared task, to investigate the ability of Large Language Models(LLMs) to reason about the causality of real-world events. More specifically, a data set consisting of different topics and choices is introduced, and we need to enable the model to select the best options for the given event. Three methods are separately introduced to explore thequestion, including the traditional natural language processing(NLP) method (DeBERTa), theenhanced knowledge graph(KG), and the KG embedded in hyperbolic space.
Anthology ID:
2026.semeval-1.114
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:
821–825
Language:
URL:
https://preview.aclanthology.org/ingest-acl-workshops/2026.semeval-1.114/
DOI:
Bibkey:
Cite (ACL):
Mingkai Wang, Varun Ojha, and Huizhi Liang. 2026. SemEval-2026 Task 12: Knowledge Graph with hyperbolic embedding in Abductive Event Reasoning. In Proceedings of the 20th International Workshop on Semantic Evaluation (2026), pages 821–825, San Diego, California, USA. Association for Computational Linguistics.
Cite (Informal):
SemEval-2026 Task 12: Knowledge Graph with hyperbolic embedding in Abductive Event Reasoning (Wang et al., SemEval 2026)
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PDF:
https://preview.aclanthology.org/ingest-acl-workshops/2026.semeval-1.114.pdf
Supplementarymaterial:
 2026.semeval-1.114.SupplementaryMaterial.zip