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Umberto Straccia is researcher at the "Istituto di Scienze e di Tecnologie dell'Informazione" (ISTI) of the Italian National Council of Research (CNR). He's main research interests include in the broad sense Knowledge Representation and Reasoning (KRR) and Information Retrieval (IR). In particular, he has interests in logics for KRR and the Semantic Web (in particular, logic programming and description logics), the management of uncertainty and vagueness, top-k retrieval, and logic-based approaches to multimedia information retrieval.