Fact Finder -- Enhancing Domain Expertise of Large Language Models by Incorporating Knowledge Graphs

Daniel Steinigen; Roman Teucher; Timm Heine Ruland; Max Rudat; Nicolas Flores-Herr; Peter Fischer; Nikola Milosevic; Christopher Schymura; Angelo Ziletti

arXiv · 2408.03010

Fact Finder -- Enhancing Domain Expertise of Large Language Models by Incorporating Knowledge Graphs

Daniel Steinigen·Roman Teucher·Timm Heine Ruland·Max Rudat·Nicolas Flores-Herr·Peter Fischer·Nikola Milosevic·Christopher Schymura·Angelo Ziletti

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Abstract

Recent advancements in Large Language Models (LLMs) have showcased their proficiency in answering natural language queries. However, their effectiveness is hindered by limited domain-specific knowledge, raising concerns about the reliability of their responses. We introduce a hybrid system that augments LLMs with domain-specific knowledge graphs (KGs), thereby aiming to enhance factual correctness using a KG-based retrieval approach. We focus on a medical KG to demonstrate our methodology, which includes (1) pre-processing, (2) Cypher query generation, (3) Cypher query processing, (4) KG retrieval, and (5) LLM-enhanced response generation. We evaluate our system on a curated dataset of 69 samples, achieving a precision of 78\% in retrieving correct KG nodes. Our findings indicate that the hybrid system surpasses a standalone LLM in accuracy and completeness, as verified by an LLM-as-a-Judge evaluation method. This positions the system as a promising tool for applications that demand factual correctness and completeness, such as target identification -- a critical process in pinpointing biological entities for disease treatment or crop enhancement. Moreover, its intuitive search interface and ability to provide accurate responses within seconds make it well-suited for time-sensitive, precision-focused research contexts. We publish the source code together with the dataset and the prompt templates used.

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Daniel Steinigen, Roman Teucher, Timm Heine Ruland, Max Rudat, Nicolas Flores-Herr, Peter Fischer, Nikola Milosevic, Christopher Schymura, Angelo Ziletti. 2024-08-06. Fact Finder -- Enhancing Domain Expertise of Large Language Models by Incorporating Knowledge Graphs. https://arxiv.org/abs/2408.03010

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