LABKAG at LLMs4OL 2025 Tasks A and C: Context-Rich Prompting for Ontology Construction

This paper presents LABKAG's submission to the LLMs4OL 2025 Challenge, focusing on ontology construction from domain-specific text using large language models (LLMs). Our core methodology prioritizes prompt design over fine-tuning or external knowledge, demonstrating its effectiveness in generating structured knowledge. For Task A (Text2Onto: extracting ontological terms and types), we utilized a locally deployed Qwen3-8B model, while for Task C (Taxonomy Discovery: identifying taxonomic hierarchies), we evaluated the performance of GPT-4o-mini and Gemini 2.5 Pro. Our experiments consistently show that incorporating in-domain examples and providing richer context within prompts significantly enhances performance. These results confirm that well-engineered prompts enable LLMs to effectively extract entities and their hierarchical relationships, offering a lightweight, adaptable, and generalizable approach to structured knowledge extraction.