add overview

README.md

@@ -1,3 +1,27 @@
 ---
 license: apache-2.0
 ---
+
+# Overview
+
+<p align="center">
+  <img src="https://avatars.githubusercontent.com/u/12619994?s=200&v=4" width="150">
+</p>
+
+<!-- -------------------------------------------------------------------------------- -->
+
+AT5S is an Arabic T5-small model. It's is **only compatible** with the code in [this github repo](https://github.com/huawei-noah/Pretrained-Language-Model/tree/master/JABER-PyTorch) (not supported by the [Transformers](https://github.com/huggingface/transformers) library)
+ 
+## Citation
+
+Please cite the following [paper](https://arxiv.org/pdf/2205.10687.pdf) when using our code and model:
+
+``` bibtex
+@article{ghaddar2022revisiting,
+  title={Revisiting Pre-trained Language Models and their Evaluation for Arabic Natural Language Understanding},
+  author={Ghaddar, Abbas and Wu, Yimeng and Bagga, Sunyam and Rashid, Ahmad and Bibi, Khalil and Rezagholizadeh, Mehdi and Xing, Chao and Wang, Yasheng and Xinyu, Duan and Wang, Zhefeng and others},
+  journal={arXiv preprint arXiv:2205.10687},
+  year={2022}
+}
+```
+