The dataset contains 5462 training samples, 711 validation samples and 725 test samples. 
Each sample represents a sentence and includes the following features: sentence ID ('sent\_id'), 
list of tokens ('tokens'), list of lemmas ('lemmas'), list of UPOS tags ('upos\_tags'), 
list of Multext-East tags ('xpos\_tags), list of morphological features ('feats'), 
and list of IOB tags ('iob\_tags'), which are encoded as class labels.