Martin Everaert is Professor of Linguistics at Utrecht University, The Netherlands. He works primarily on the syntax-semantics interface (anaphora: reflexives, reciprocals) and the lexicon-syntax interface (idioms/collocations, and argument structure). His other areas of interest are language evolution, biolinguistics, and the history of linguistics. He is on the editorial boards of several journals, including Linguistic Inquiry. His books include Concepts, Syntax and Their Interfaces - The Theta System. (2016) and Birdsong, Speech and Language: Exploring the Evolution of Mind and Brain (2013). He is co-editor of the Wiley Blackwell Companions to Linguistics series and member of the editorial advisory board of De Gruyter Open. Henk van Riemsdijk was, until recently, Professor of Linguistics and head of the Models of Grammar Group at Tilburg University, The Netherlands. He is now emeritus professor and a freelance linguist operating from his home in Arezzo, Italy. He is the co-founder of GLOW, the major professional organization of generative linguists in Europe. He was the co-editor of the Journal of Comparative Germanic Linguistics from 2001 through 2013 and of the Mouton de Gruyter book series Studies in Generative Grammar from 1978 through 2013. He is co-editor of the Wiley Blackwell Companions to Linguistics series and the Comprehensive Grammar Resources series at Amsterdam University Press. He has written and edited 30 books, published well over 100 major articles, and directed 30 PhD dissertations.