arXiv — NLP / Computation & Language · · 3 min read

Language Models Can Resolve Reference Compositionally, But It's Not Their Native Strength: The Case of the Personal Relation Task

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Computer Science > Computation and Language

arXiv:2605.31480 (cs)
[Submitted on 29 May 2026]

Title:Language Models Can Resolve Reference Compositionally, But It's Not Their Native Strength: The Case of the Personal Relation Task

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Abstract:Do neural models, such as Large Language Models, genuinely acquire compositional abilities for interpretation of natural language? When we talk about semantic interpretation, we can distinguish two complementary aspects: establishing what an expression refers to in the world (which we call the Extensional task) and representing its sense in a structured way (which we call the Intensional task). We evaluate LLMs and humans on both tasks in the setting of the Personal Relation Task (Paperno 2022) in which, given a universe of people and their relationships with each other, one is asked to interpret a noun phrase such as "Amber's parent's friend". Here, for the Intensional task, the answer is the formula "friend(parent(amber))", and for the Extensional task, the person. We find that humans and LLMs show opposite strengths: humans perform better on Extensional than Intensional tasks, and LLMs vice versa. Our methodology brings greater nuance to the understanding of compositional abilities in modern machine learning models. Our results support the notion that the lack of referential grounding in LLM training is a crucial missing component in mimicking human-like language understanding.
Comments: A pre-MIT Press publication version. Paper accepted to Transactions of the Association for Computational Linguistics
Subjects: Computation and Language (cs.CL)
ACM classes: I.2.7
Cite as: arXiv:2605.31480 [cs.CL]
  (or arXiv:2605.31480v1 [cs.CL] for this version)
  https://doi.org/10.48550/arXiv.2605.31480
arXiv-issued DOI via DataCite (pending registration)

Submission history

From: Denis Paperno [view email]
[v1] Fri, 29 May 2026 16:07:04 UTC (164 KB)
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