Human Label Variation in Coreference (Hlava COR) is a collection of commented multiple annotations (three annotators) of coreferential relations in Czech, i.e. the annotation of expressions that refer to the same extra-linguistic entity, concept, or situation. Given an anaphoric expression, annotators were instructed to identify a coreferential expression in the preceding context (if one exists) and to comment on their decision. The main aim of the annotation is to capture variation in the interpretation of coreference among readers. The dataset includes both written and spoken contexts. For detailed and up-to-date information about the corpus, please visit: https://ufal.mff.cuni.cz/hvar/hlava-cor