Update README.md

README.md

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 ## Introduction
 
-This model is currently under evaluation - details will be published soon
+Having the same architecture of [Bert] we trained our model from scratch following [BERT](https://arxiv.org/abs/1810.04805) pre-training procedure. And has been built from a collection of about 238 million tweets written by over 100 thousand unique Twitter users, and conveying over 2.9 billion words in total.
 
 ## Available models