Semantic Grounding of Tag Relatedness in Social Bookmarking Systems. In Amit Sheth, Steffen Staab, Mike Dean, Massimo Paolucci, Diana Maynard, Timothy Finin, and Krishnaprasad Thirunarayan (Eds.), The Semantic Web - ISWC 2008, (5318):615--631, Springer Berlin / Heidelberg, 2008. [PUMA: 2008 grounding itegpub l3s literature myown pragmatic relatedness semantic seminar summer tagging wordnet] URL