Update README.md

README.md

@@ -15,4 +15,10 @@ The dataset is relevant to Ukrainian reviews in three different domains:
 
 The data is scrapped from Tripadvisor (https://www.tripadvisor.com/) and Rozetka (https://rozetka.com.ua/).
 
-The dataset was initially used for extraction of key-phrases relevant to one of rating categories, based on trained machine learning model (future article link will be here).
+The dataset was initially used for extraction of key-phrases relevant to one of rating categories, based on trained machine learning model (future article link will be here).
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+Dataset is processed to include two additional columns: one with lemmatized tokens and another one with POS tags. Both lemmatization and POS tagging are done using pymorphy2 (https://pymorphy2.readthedocs.io/en/stable/) library.
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+The words are tokenized using a specific regex tokenizer to account for usage of apostroph.
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+Those reviews which weren't in Ukrainian were translated to it using Microsoft translator and re-checked manually afterwards.