“…In particular, the occurrence of the non-manual marker for polar questions (i.e. eyebrows raising) as the non-manual marker in relative construc-2 The information in this table is based on our bibliography study of the available publications on: American Sign Language (Liddell, 1978;McIntire, 1982;Coulter, 1983;Fontana, 1990;Wilbur, 2017); Argentine Sign Language (Veinberg and Massone, 1992); Catalan Sign Language (Mosella, 2012;Jarque, 2016); Danish Sign Language (Engberg-Pedersen, 1990); French Sign Language (Hauser and Geraci, 2018;Hauser, 2019); German Sign Language (Pfau and Steinback, 2005;Happ and Vorköper, 2006); Hong Kong Sign Language (Tang and Lau, 2012); Israeli Sign Language (Sandler, 2006;Dachkovsky and Sandler, 2009); Italian Sign Language (Brunelli, 2006(Brunelli, , 2011Branchini and Donati, 2009;Branchini, 2014;Cecchetto and Donati, 2016); Japanese Sign Language (Penner and Yano, 2019); Russian Sign Language (Khristoforova and Kimmelman, 2020); and Sign Language of the Netherlands (Kimmelman and Vink, 2017;Wilbur, 2017). Examples and limited references to relative clauses are found regarding Brazilian Sign Language (Nunez and de Quadros, 2004); Spanish Sign Language (Herrero, 2009); and Swedish Sign Language (Bergman, 1994).…”