Affiliation: | a Semantic Computing Group, Cognitive Interaction Technology Excellence Center (CITEC), Bielefeld University, Universitätsstrasse 21-23, 33615 Bielefeld, NRW, Germany;b Unit for Natural Language Processing, Digital Enterprise Research Institute, National University of Ireland, Galway, Ireland;c Knowledge Management Dept. & Competence Center Semantic Web, DFKI, Germany |