Automated Classification of Written Proficiency Levels on the CEFR-Scale through Complexity Contours and RNNs Elma Kerz author Daniel Wiechmann author Yu Qiao author Emma Tseng author Marcus Ströbel author 2021-04 text Proceedings of the 16th Workshop on Innovative Use of NLP for Building Educational Applications Jill Burstein editor Andrea Horbach editor Ekaterina Kochmar editor Ronja Laarmann-Quante editor Claudia Leacock editor Nitin Madnani editor Ildikó Pilán editor Helen Yannakoudakis editor Torsten Zesch editor Association for Computational Linguistics Online conference publication kerz-etal-2021-automated https://aclanthology.org/2021.bea-1.21/ 2021-04 199 209