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Book chapter

GRAMEVAL 2020 Shared Task: Russian Full Morphology and Universal Dependencies Parsing

P. 553-569.
Lyashevskaya O., Shavrina T., Trofimov I., Vlasova N. A.

The paper presents the results of GramEval 2020, a shared task on Russian morphological and syntactic processing. The objective is to process Russian texts starting from provided tokens to parts of speech (pos), grammatical features, lemmas, and labeled dependency trees. To encourage the multi-domain processing, five genres of Modern Russian are selected as test data: news, social media and electronic communication, wiki-texts, fiction, poetry; Middle Russian texts are used as the sixth test set. The data annotation follows the Universal Dependencies scheme. Unlike in many similar tasks, the collection of existing resources, the annotation of which is not perfectly harmonized, is provided for training, so the variability in annotations is a further source of difficulties. The main metric is the average accuracy of pos, features, and lemma tagging, and LAS. In this report, the organizers of GramEval 2020 overview the task, training and test data, evaluation methodology, submission routine, and participating systems. The approaches proposed by the participating systems and their results are reported and analyzed.