The Leibniz Universität Hannover (LUH) is one of the largest universities in Niedersachsen with about 29,000 students. The subject spectrum reaches from the natural sciences and engineering over humanities and social sciences to economics and law. The L3S Research Center is a joint research institute of several universities in Lower Saxony, Germany, associated with LUH. It includes about 80 employees and its total budget in 2017 amounted to about 8 million Euros, with about ¾ of the budget being third party funding from projects funded by the European Commission, German Research Foundation (DFG), German federal state governments or governmental institutions as well as from industry. Work at L3S focuses on innovative and cutting-edge methods and technologies for three key enablers for the European Information Society: Knowledge, Information and Learning. Projects investigate innovative scenarios and solutions in the areas of Technology Enhanced Learning and Web Science such as Web Search, Web Information Management, Semantic Web Technologies, Search and Information Retrieval, Distributed and Peer-to-Peer Information Systems, the Future Internet and the Web of People (including Personalization, Diversity-aware services, and Social Web solutions).