1 Neuroinformatics Group Faculty of Technology Bielefeld university D-33501 Bielefeld, Germany; Sony Computer Science Laboratories Inc. Tokyo 141-0022, Japan.
2 Department of German Studies and Comparative Literature Studies Paderborn University D-33098 Paderborn, Germany.
3 Department of Cognitive Science and Artificial Intelligence Tilburg university 5037 AB Tilburg, The Netherlands.
4 Department of Psychological and Brain Sciences Indiana university Bloomington, IN 47405 USA.
5 Sony Computer Science Laboratories Inc., Tokyo 141-0022, Japan.