Large Language Models-guided Dynamic Adaptation for Temporal Knowledge Graph Reasoning

Temporal Knowledge Graph Reasoning (TKGR) is the process of utilizing temporal information to capture complex relations within a Temporal Knowledge Graph (TKG) to infer new knowledge. Conventional methods in TKGR typically depend on deep learning algorithms or temporal logical rules. However, deep learning-based TKGRs often lack interpretability, whereas rule-based TKGRs struggle to effectively learn temporal rules that capture temporal patterns. Recently, Large Language Models (LLMs) have demonstrated extensive knowledge and remarkable proficiency in temporal reasoning. Consequently, the employment of LLMs for Temporal Knowledge Graph Reasoning (TKGR) has sparked increasing interest among researchers. Nonetheless, LLMs are known to function as black boxes, making it challenging to comprehend their reasoning process. Additionally, due to the resource-intensive nature of fine-tuning, promptly updating LLMs to integrate evolving knowledge within TKGs for reasoning is impractical. To address these challenges, in this paper, we propose a Large Language Models-guided Dynamic Adaptation (LLM-DA) method for reasoning on TKGs. Specifically, LLM-DA harnesses the capabilities of LLMs to analyze historical data and extract temporal logical rules. These rules unveil temporal patterns and facilitate interpretable reasoning. To account for the evolving nature of TKGs, a dynamic adaptation strategy is proposed to update the LLM-generated rules with the latest events. This ensures that the extracted rules always incorporate the most recent knowledge and better generalize to the predictions on future events. Experimental results show that without the need of fine-tuning, LLM-DA significantly improves the accuracy of reasoning over several common datasets, providing a robust framework for TKGR tasks.

Paper

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Peer review

Reviewer CXWD5/10 · confidence 4/52024-06-17

Summary

This paper proposes Large Language Models-guided Dynamic Adaptation (LLM-DA) to leverage LLMs to extract temporal logical rules for TKGR. Experimental results demonstrate LLM-DA significantly improves reasoning accuracy without the need for fine-tuning the LLM.

Strengths

The paper is well-structured and easy to follow, the idea of extract and ground logic rules are clear motivated and illustrated. Levearging LLM to exploit rules rather than predict the answers is interesting. LLM-DA significantly outperforms the LLM-based methods on several datasets.

Weaknesses

The writing could be improved. Some figures should be polished. LLM-DA leverages GPT 3.5 as the LLM model, while the other baselines use only 7B LLM models. The authors should also conduct experiments to study the impact of different LLM models.

Questions

Please see Weaknesses.

Rating

5

Confidence

4

Soundness

2

Presentation

2

Contribution

3

Limitations

N/A

Reviewer thzY7/10 · confidence 5/52024-07-10

Summary

This paper explores the use of Large Language Models (LLMs) for Temporal Knowledge Graph Reasoning (TKGR). Specifically, the paper leverages LLMs for rule-based TKGR to identify temporal patterns and enable interpretable reasoning. Additionally, it introduces a dynamic adaptation strategy that iteratively updates the LLM-generated rules with the latest events, enhancing the model's adaptation to the evolving dynamics of TKGs.

Strengths

S1. Compared to other LLM-based TKGR approaches, this paper demonstrates a significant improvement without the need for fine-tuning LLMs. S2. It introduces a novel dynamic adaptation strategy, guiding LLMs to capture temporal evolution patterns in TKGs by continuously updating the knowledge rather than the LLMs themselves. S3. Intuitive figures and tables enhance the readability of the paper.

Weaknesses

W1. There is limited analysis of the constrained Markovian random walks. W2. While Figure 1 intuitively reflects the paper's motivation, it could be improved. Moreover, the dynamic adaptation strategy, which should be the core focus, occupies a relatively small proportion in Figure 2. W3. Several minor grammatical and expression issues need attention.

Questions

Q1. Do the other modules in the paper, such as the contextual relation selector and the graph-based reasoning function, also require pre-training in addition to the LLMs? Q2. The current experimental analysis is too superficial. To better validate the proposed method, a more in-depth analysis of the experiments is needed.

Rating

7

Confidence

5

Soundness

4

Presentation

4

Contribution

3

Limitations

The authors clearly point out that this work is not query-dependent, which can lead to a lack of specificity in the generated rules. This provides a solid direction for future work to enhance the specificity of generated rules. Additionally, it is recommended that the authors discuss in depth the problems posed by not considering node semantics. Failure to consider node semantics may result in the loss of important contextual information and affect the overall accuracy of the model. A more detailed discussion of this limitation would greatly benefit the paper.

Reviewer 9wEQ6/10 · confidence 3/52024-07-17

Summary

This paper introduces Large Language Models-guided Dynamic Adaptation (LLM-DA), a novel approach for Temporal Knowledge Graph Reasoning (TKGR). LLM-DA leverages LLMs to extract temporal logical rules from historical data, providing interpretable reasoning. It also incorporates a dynamic adaptation strategy to update these rules with the latest events, ensuring the extracted rules reflect the most recent knowledge. Experimental results over several common datasets show that , LLM-DA, without the need of fine-tuning, significantly outperforms graph-based TKG method and LLM-based method in accurate reasoning.

Strengths

- Though recently many efforts have been put into applying LLMs in TKG, this paper poses a novel way of applying LLM in TKGR as a temporal logic rule extractor to dynamically extract and update meaningful temporal patterns and complex temporal dependencies from the evolving event data, which provides extra interpretability to the forecasting process compare to a simple in-context LLM forecasting. - The experiments have shown that the performance of the proposed method has surpassed the traditional graph-based TKG method and the recent LLM-based TKG methods. - The analysis on the dynamic adaptation is very interesting and is in-depth and solid, shows the effectiveness of the dynamic adaptation in extracting the evolving temporal patterns.

Weaknesses

- Long-horizon forecasting concerns: Concerns will be raised about the dynamic adaptation in cases where no near historical data is available, i.e. in the long-horizon forecasting task where the future data patterns and rules may largely differ from the seen data, how generalizable and robust this proposed method will be? - Limited evaluation of generated rules: While the LLM mainly participates in the rule extraction part, the paper lacks a comprehensive quantitative and qualitative evaluation of the generated rules. For instance, there's no assessment of how well the LLM generates symbolically and logically correct rules.

Questions

Please refer to the questions raised in Weakness section.

Rating

6

Confidence

3

Soundness

3

Presentation

3

Contribution

3

Limitations

Yes, the author has discussed the limitations in Appendix D, and proposed reasonable solutions fas the future works.

Reviewer thzY2024-08-11

The authors have addressed well my concerns, and, considering the comments from other reviewers, I would like to improve my rating.

Reviewer 9wEQ2024-08-11

Thanks the authors for the rebuttal, especially the evaluation of the generated rules addresses my original concern, please consider adding this to future editions of the paper.

Authorsrebuttal2024-08-11

Response to Reviewer 9wEQ

We sincerely appreciate your timely reply and support for our work. We will add the experiments evaluating the generated rules in future editions of the paper. Your suggestions have been invaluable in enhancing the quality of our research, and we are eager to incorporate these improvements. Thank you once again for your constructive comment and encouragement.

Program Chairsdecision2024-09-25

Decision

Accept (poster)

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