Niels Landwehr Bernd Gutmann Ingo Thon Luc De Raedt Matthai Philipose Relational Transformation-based Tagging for Activity Recognition. 111-129 2008 89 Fundam. Inform. 1 http://iospress.metapress.com/content/u040211744m2w8v2/ db/journals/fuin/fuin89.html#LandwehrGTRP08