Challenge: Existing methods rely on entity vector matching, but the purpose of the question is abstract and difficult to match with specific entities. Existing approaches rely only on entity-vector matching, and there is a problem with multi-hop reasoning.
Approach: They propose a framework that constructs reasoning paths from purposes back to conditions using the KG ontology.
Outcome: Experiments on the WebQSP and CWQ datasets show that ORT significantly improves the capability of large language models in knowledge graph question answering tasks (KGQA).

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Reasoning with Ontology Graph: Toward Type-Constrained Knowledge Graph Question Answering (2026.acl-long)

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Challenge: Existing knowledge graph question answering methods rely on LLM-induced type systems with inconsistent granularity or perform multi-hop reasoning without explicit target-type constraints.
Approach: They propose a type-constrained knowledge graph question answering framework that reasons over a relation-centric ontology graph.
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From Query to Logic: Ontology-Driven Multi-Hop Reasoning in LLMs (2026.findings-acl)

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Challenge: Large Language Models (LLMs) exhibit limitations in complex multi-hop question answering tasks that necessitate non-linear, structured reasoning.
Approach: They propose an ontology-driven reasoning and chain framework that combines LLMs’ generative capabilities with the structural benefits of knowledge graphs.
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FiDeLiS: Faithful Reasoning in Large Language Models for Knowledge Graph Question Answering (2025.findings-acl)

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Challenge: Existing retrieval-based or agent-based methods are prone to generating erroneous or hallucinated outputs.
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Right for Right Reasons: Large Language Models for Verifiable Commonsense Knowledge Graph Question Answering (2024.emnlp-main)

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Challenge: Existing Knowledge Graph Question Answering (KGQA) methods focus on answering factual questions, leaving questions involving commonsense reasoning unaddressed.
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Thought-Action Graph Reasoning: Faithful and Efficient Reasoning of Large Language Models via Reusing Past Experience (2026.findings-acl)

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Challenge: Existing methods for integrating knowledge graphs with LLMs suffer from poor generalization or low reasoning efficiency.
Approach: They propose a thought-action Graph (TAG) that decomposes LLM-KG interaction trajectories into fine-grained semantic operators and guides LLM to execute on them.
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KG-GPT: A General Framework for Reasoning on Knowledge Graphs Using Large Language Models (2023.findings-emnlp)

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Challenge: Using large language models for complex reasoning tasks on knowledge graphs remains unexplored.
Approach: They propose a multi-purpose framework leveraging large language models for complex reasoning tasks on knowledge graphs.
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Correcting on Graph: Faithful Semantic Parsing over Knowledge Graphs with Large Language Models (2025.findings-acl)

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Challenge: Complex multi-hop questions require comprehensive retrieval and reasoning.
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Knowledge Graph-Enhanced Large Language Models via Path Selection (2024.findings-acl)

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Challenge: Large Language Models (LLMs) have shown unprecedented performance in various real-world applications, but they are known to generate factually inaccurate outputs.
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Augmenting Reasoning Capabilities of LLMs with Graph Structures in Knowledge Base Question Answering (2024.findings-emnlp)

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Challenge: Recent work uses Large Language Models (LLMs) for semantic parsing to address Knowledge Base Question Answering tasks.
Approach: They propose a framework that augments reasoning capabilities of LLMs with Graph Structures in Knowledge Base Question Answering to retrieve question-related graph structures.
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Topology-of-Question-Decomposition: Enhancing Large Language Models with Information Retrieval for Knowledge-Intensive Tasks (2025.coling-main)

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Challenge: Large language models (LLMs) are constrained to chaining immediate reasoning steps and relying solely on parametric knowledge.
Approach: They propose a framework that activates retrieval only when necessary to improve answer accuracy.
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