From Raw Text to Enhanced Universal Dependencies: the Parsing Shared Task at IWPT 2021. In: Proceedings of the 17th International Conference on Parsing Technologies and the IWPT 2021 Shared Task on Parsing into Enhanced Universal Dependencies, pp. 146-157, Association for Computational Linguistics, Stroudsburg, PA, USA, ISBN 978-1-954085-80-0 (url, local PDF, bibtex)