Frame-Semantic Knowledge Injection for Event-Level Inference in LLMs

Shahid Iqbal Rai, Danilo Croce, Roberto Basili


Abstract
Large language models (LLMs) are fluent but often brittle when interpretation depends on external information (e.g., events or participant roles), as next-token prediction does not explicitly encode situation-level semantic constraints. FrameNet provides a structured account of semantics through its inventory of frames, roles, and relations. We present a scalable framework that injects frame-semantic knowledge into LLMs via LoRA, moving from fact-oriented prompting to principle-oriented supervision over the full FrameNet inventory. The supervision encodes semantic constraints through semantic types, sense-aware definitions, frame relations, and role-annotated examples. To test whether this knowledge generalizes beyond surface cues, we use Natural Language Inference (NLI) as a diagnostic task for event-level reasoning. Experiments on CONFER and SNLI show consistent gains over Meta-Llama-3.1-8B-Instruct in zero-shot and few-shot settings, especially for entailment and contradiction. Complementary semantic role labeling analyses further indicate improved sensitivity to frame, role, and span structure.
Anthology ID:
2026.acl-short.55
Volume:
Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers)
Month:
July
Year:
2026
Address:
San Diego, California, United States
Editors:
Maria Liakata, Viviane P. Moreira, Jiajun Zhang, David Jurgens
Venue:
ACL
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Publisher:
Association for Computational Linguistics
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Pages:
664–678
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URL:
https://preview.aclanthology.org/ingest-acl/2026.acl-short.55/
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Cite (ACL):
Shahid Iqbal Rai, Danilo Croce, and Roberto Basili. 2026. Frame-Semantic Knowledge Injection for Event-Level Inference in LLMs. In Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers), pages 664–678, San Diego, California, United States. Association for Computational Linguistics.
Cite (Informal):
Frame-Semantic Knowledge Injection for Event-Level Inference in LLMs (Rai et al., ACL 2026)
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https://preview.aclanthology.org/ingest-acl/2026.acl-short.55.pdf
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