Kostas Stefanidis is a research scientist at ICS-FORTH, Greece. Previously, he worked as a post-doctoral researcher at the IDI Dept. of NTNU in Norway, with a scholarship funded by the ERCIM Marie Curie Network, and the CSE Dept. of CUHK in Hong Kong. He got his Ph.D. in personalized data management from the University of Ioannina, Greece, in 2009. His research interests lie in the intersection of databases, Web and information retrieval, and include personalized and context-aware data management systems, recommender systems, keyword-based search, and information extraction, resolution, and in...