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arXiv 2410.08085cs.CLcs.AI

知识图谱能否让大语言模型更可信?开放域问答上的实证研究

Can Knowledge Graphs Make Large Language Models More Trustworthy? An Empirical Study Over Open-ended Question Answering

National University of Singapore(新加坡国立大学);University of Cambridge(剑桥大学)

Yuan Sui, Yufei He, Zifeng Ding, Bryan Hooi

AI总结:

本研究提出OKGQA基准,在开放域问答中评估知识图谱增强的大语言模型的可信度,并引入扰动变体验证其抗幻觉能力,旨在探索KG提升LLM可信度的潜力。

摘要:

近期整合知识图谱(KG)的工作在增强大语言模型(LLM)的推理能力方面显示出有前景的改进。然而,现有基准主要聚焦于封闭式任务,在评估更复杂的现实世界场景性能方面存在空白。这一局限性也阻碍了对知识图谱在减少大语言模型幻觉方面潜力的全面评估。为解决这一问题,我们引入了OKGQA,这是一个新基准,专门设计用于在开放域、现实世界的问答设置中评估由知识图谱增强的大语言模型。OKGQA通过多样的问题类型反映了实际复杂性,并纳入了量化LLM+KG模型中幻觉率和推理改进的指标。为考虑知识图谱可能包含不同程度错误的情景,我们提出了一个基准变体OKGQA-P,用于评估当知识图谱的语义和结构被故意扰动和污染时模型的性能。在本文中,我们旨在(1)探索在开放域设置中知识图谱是否能使大语言模型更可信,以及(2)进行比较分析以阐明方法设计。我们相信这项研究能促进更完整的性能比较,并鼓励在将知识图谱与大语言模型集成以减轻幻觉并使大语言模型更可信方面持续改进。代码和数据已在https://github.com/Y-Sui/OKGQA发布。

英文摘要:

Recent works integrating Knowledge Graphs (KGs) have shown promising improvements in enhancing the reasoning capabilities of Large Language Models (LLMs). However, existing benchmarks primarily focus on closed-ended tasks, leaving a gap in evaluating performance on more complex, real-world scenarios. This limitation also hinders a thorough assessment of KGs' potential to reduce hallucinations in LLMs. To address this, we introduce OKGQA, a new benchmark specifically designed to evaluate LLMs augmented with KGs in open-ended, real-world question answering settings. OKGQA reflects practical complexities through diverse question types and incorporates metrics to quantify both hallucination rates and reasoning improvements in LLM+KG models. To consider the scenarios in which KGs may contain varying levels of errors, we propose a benchmark variant, OKGQA-P, to assess model performance when the semantics and structure of KGs are deliberately perturbed and contaminated. In this paper, we aims to (1) explore whether KGs can make LLMs more trustworthy in an open-ended setting, and (2) conduct a comparative analysis to shed light on method design. We believe this study can facilitate a more complete performance comparison and encourages continuous improvement in integrating KGs with LLMs to mitigate hallucination, and make LLMs more trustworthy. Code and data are released at https://github.com/Y-Sui/OKGQA.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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