arXiv Computation and Language By Anh Danh, Rick Nouwen, Massimo Poesio

A Circuit for Plural Reference: How LLMs Represent and Retrieve Singular and Plural Entities

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The paper investigates how large language models (LLMs) represent and retrieve singular and plural entities for coreference resolution. Using mechanistic interpretability and attention pattern analysis, the authors identify specific attention heads that encode coreference information, detect plural entities, and guide pronoun prediction. The study also shows that LLMs prefer plural pronouns for ontologically similar entities linked by "and", mirroring human preferences.

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