Affiliation: | 1. Department of Information Science and Media Studies, University of Bergen, PB. 7802, N-5020 Bergen, Norway;2. IRIT, Université Paul Sabatier, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France;3. Department of Logic, Faculty of Philosophy, University of Sevilla, Calle Camilo Jose Cela s/n, 41018 Sevilla, Spain |