ISI Directory

Filip Ilievski, Ph.D

Computer Scientist


Ph.D, Natural Language Processing, VU Amsterdam, The Netherlands
MSc., Artificial Intelligence, VU Amsterdam, The Netherlands
BSc., Computer Science, Ss. Cyril and Methodius University of Skopje, Macedonia


I am a Research Scientist in the Center on Knowledge Graphs within the Information Sciences Institute (ISI) at the USC Viterbi School of Engineering. I hold a Ph.D. in Natural Language Processing from the Vrije Universiteit (VU) in Amsterdam, where I also worked as a postdoctoral researcher before joining ISI. My research focuses on the role of commonsense and encyclopedic knowledge in filling gaps in human communication. Over the past three years, I mentored around twenty Master’s and Ph.D. students, and collaborated with researchers at USC, CMU, Bosch Research, RPI, and the University of Lyon. I have over 40 peer-reviewed publications in top-tier venues on commonsense reasoning, information extraction, and knowledge graphs. I have been actively organizing workshops (AAAI’21), tutorials (AAAI’21, ISWC’20, ISWC’21, TheWebConf’22), symposiums (USC), and a special journal issue (Semantic Web Journal) on these topics. 

Research Summary

My principal research interest concerns the role of background knowledge for filling gaps in human communication. I am leading the development of the Commonsense Knowledge Graph (CSKG), a resource which consolidates existing sources into a harmonized representation. CSKG allows us to enhance language models for zero-shot Question Answering with more knowledge, precisely select relevant subsets, or perform explainable inference. I am also heavily involved in the development of the Knowledge Graph ToolKit (KGTK) - a comprehensive set of operations for working with modern, hyperrelational graphs like Wikidata. In the past year, I worked together with around 10 Ph.D. and Master students, and collaborated with researchers at CMU, Bosch Research, RPI, etc. We have been publishing this work in top-tier venues like AAAI, EMNLP, NAACL, and ISWC, and organizing commonsense workshops (AAAI’21) and tutorials (AAAI’21, ISWC’20, ISWC’21, TheWebConf’22).