**About the Special Issue Editors**

**Łukasz Dębowski** obtained his MS.c. degree in Theoretical Physics from Warsaw University in 1994, Ph.D. degree in Computer Science from the Polish Academy of Sciences in 2005, and Habilitation in Computer Science from the Polish Academy of Sciences in 2015. He visited the Institute of Formal and Applied Linguistics at Charles University in 2001, Santa Fe Institute in 2002, the School of Computer Science and Engineering at the University of New South Wales in 2006, the Centrum Wiskunde & Informatica from 2008 to 2009, and the Department of Advanced Information Technology at Kyushu University in 2015. He is currently an Associate Professor at the Institute of Computer Science of the Polish Academy of Sciences. His research interests include information theory, statistics, linguistics, and natural language engineering. He is a member of the International Quantitative Linguistics Association.

**Christian Bentz** holds a Ph.D. in Computation, Cognition and Language from the University of Cambridge. He is currently Assistant Professor (Akademischer Rat a. Z.) at the University of Tubingen. ¨ Prior to this appointment, he was a Postdoctoral Researcher at URPP Language and Space, University of Zurich, ¨ and a Research Fellow at the DFG Center for Advanced Studies "Words, Bones, Genes, Tools" at University of Tubingen. ¨ His research focuses on the application of information theory to natural languages and other symbolic systems.
