Labs

Abstract: The hands-on lab will demonstrate how to implement a Retrieval-Augmented Generation (RAG) system using open-source LLMs. Participants will learn how to customize and run local models with Ollama, generate context-aware embeddings via LangChain, and store relevant knowledge in vector databases. We will showcase strategies to efficiently retrieve and integrate external information, emphasizing the importance of entity-aware structures to enhance accuracy and contextual grounding. Through live coding and interactive exercises, attendees will gain practical insights into harnessing entity-focused techniques, bridging the gap between theoretical concepts of knowledge graph construction and real-world RAG implementations for various linguistic and semantic use cases.

Short Bio: Marco Cremaschi is a research assistant at the University of Milan-Bicocca, Department of Informatics, Systems, and Communication (DISCo). He teaches courses at several academic institutions, including the University of Bergamo and Università Cattolica (Master's degree in Linguistic Computing). His research expertise spans knowledge graph construction, data enrichment, and—more recently—the application of artificial intelligence techniques for developing clinical decision support systems and predictive models in mental health. Over the years, he has significantly contributed to the Semantic Web and AI communities by publishing scientific papers in reputable conferences and journals, and by serving on the program committees of various top-tier international conferences, where he has taken on roles such as chair and reviewer. He is the founder of a university spin-off dedicated to harnessing artificial intelligence in the health and finance sectors.

Abstract:Large Language Models (LLMs) are transforming the way we interact with language technologies, offering new possibilities for linguistic data processing and representation. This hands-on lab explores the potential of LLMs for generating Linguistic Knowledge Graphs, with a focus on the OntoLex-Lemon model. Through practical exercises, we will examine how LLMs perform in formalizing lexical data across different languages, evaluating their output using a multidimensional framework that considers lexical, morphological, and semantic factors. The session will highlight both the opportunities and challenges of integrating LLMs into the Semantic Web context,
articularly for linguistic resource creation and enrichment.

Short Bio: Blerina Spahiu is an Assistant Professor at the University of Milano-Bicocca, within the Department of Informatics, Systems, and Communication (DISCo) in Italy. Her research expertise includes knowledge graph profiling, data quality evaluation, and data enrichment, with a recent focus on leveraging LLM-based multi-agent architectures for collaborative knowledge sharing and validation. She has been involved in several European and national research projects and currently serves as the group leader for Knowledge Graph Management within the GOBLIN COST Action. She is an active contributor to the academic community, serving as chair and program committee member for numerous top-tier international conferences, and collaborates closely with researchers across both academia and industry.

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