His general research interests lie at the intersection of information retrieval, textual data mining and health informatics. Before joining Wayne State, he was a post-doctoral fellow at Emory University working with Prof. Eugene Agichtein. Dr. Kotov obtained his PhD from the University of Illinois at Urbana-Champaign, under the supervision of Professor ChengXiang Zhai. At Wayne State has been teaching graduate courses on Information Retrieval and NoSQL databases as well as undergraduate courses. This tutorial will cover his work on using semantic networks for query expansion and his recent work on entity retrieval from knowledge graphs.