GraphextQA: A Benchmark for Evaluating Graph-Enhanced Large Language Models

• URL: http://arxiv.org/abs/2310.08487v1
• Date: Thu, 12 Oct 2023 16:46:58 GMT
• Title: GraphextQA: A Benchmark for Evaluating Graph-Enhanced Large Language Models
• Authors: Yuanchun Shen, Ruotong Liao, Zhen Han, Yunpu Ma, Volker Tresp
• Abstract summary: We present a benchmark dataset for evaluating the integration of graph knowledge into language models. The proposed dataset is designed to evaluate graph-language models' ability to understand graphs and make use of it for answer generation. We perform experiments with language-only models and the proposed graph-language model to validate the usefulness of the paired graphs and to demonstrate the difficulty of the task.
• Score: 33.56759621666477
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: While multi-modal models have successfully integrated information from image, video, and audio modalities, integrating graph modality into large language models (LLMs) remains unexplored. This discrepancy largely stems from the inherent divergence between structured graph data and unstructured text data. Incorporating graph knowledge provides a reliable source of information, enabling potential solutions to address issues in text generation, e.g., hallucination, and lack of domain knowledge. To evaluate the integration of graph knowledge into language models, a dedicated dataset is needed. However, there is currently no benchmark dataset specifically designed for multimodal graph-language models. To address this gap, we propose GraphextQA, a question answering dataset with paired subgraphs, retrieved from Wikidata, to facilitate the evaluation and future development of graph-language models. Additionally, we introduce a baseline model called CrossGNN, which conditions answer generation on the paired graphs by cross-attending question-aware graph features at decoding. The proposed dataset is designed to evaluate graph-language models' ability to understand graphs and make use of it for answer generation. We perform experiments with language-only models and the proposed graph-language model to validate the usefulness of the paired graphs and to demonstrate the difficulty of the task.

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