1. Department of Comparative Language Science, University of Zurich, Zurich, Switzerland
2. Center for the Interdisciplinary Study of Language Evolution, University of Zurich, Zurich, Switzerland
3. Department of Linguistics and Basque Studies, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Spain
4. Department of Psychology, University of Klagenfurt, Klagenfurt, Austria