readme update

README.md

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 # XL-WSD
 Huggingface dataset for the paper [https://www.aclweb.org/anthology/2020.emnlp-main.584.pdf](https://www.aclweb.org/anthology/2020.emnlp-main.584.pdf).
+
+## Languages
+XL-WiC provides training data in:
+- en (English)
+- fr (French)
+- de (German)
+- it (Italian)
+
+and dev and test data in:
+- fr (French)
+- de (German)
+- it (Italian)
+- bg (Bulgarian)
+- zh (Chinese)
+- hr (Croatian)
+- da (Danish)
+- nl (Dutch)
+- et (Estonian)
+- fa (Farsi)
+- ja (Japanesse)
+- ko (Korean)
+
+## Sub datasets
+When loading one of the XL-WSD datasets one has to specify the training language and the target language (on which dev and test will be performed).
+For example, we can load the dataset having English as training language and Italian as target language as follows:
+```
+from datasets import load_dataset
+dataset = load_dataset('pasinit/xlwic', 'en_it')
+```