NEREL: A Russian Dataset with Nested Named Entities, Relations and Events Natalia Loukachevitch author Ekaterina Artemova author Tatiana Batura author Pavel Braslavski author Ilia Denisov author Vladimir Ivanov author Suresh Manandhar author Alexander Pugachev author Elena Tutubalina author 2021-09 text Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP 2021) Ruslan Mitkov editor Galia Angelova editor INCOMA Ltd. Held Online conference publication loukachevitch-etal-2021-nerel https://aclanthology.org/2021.ranlp-1.100/ 2021-09 876 885