From
https://lindat.mff.cuni.cz/repository/xmlui/handle/11234/1-5053:
CorefUD is a collection of previously existing datasets annotated with coreference, which we converted into a common annotation scheme. In total, CorefUD in its current version 1.1 consists of 21 datasets for 13 languages. The datasets are enriched with automatic… See the full description on the dataset page:
https://huggingface.co/datasets/coref-data/corefud_raw.