Update README.md

README.md

@@ -8,4 +8,16 @@ metrics:
 - squad_v2
 library_name: transformers
 pipeline_tag: question-answering
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+---
+
+# roberta for Extractive QA
+
+This is the [roberta-base](https://huggingface.co/roberta-base) model, fine-tuned using the [SQuAD2.0](https://huggingface.co/datasets/squad_v2) dataset. It's been trained on question-answer pairs, including unanswerable questions, for the task of Extractive Question Answering. 
+
+
+## Overview
+**Language model:** roberta-base  
+**Language:** English  
+**Downstream-task:** Extractive QA  
+**Training data:** SQuAD 2.0  
+**Eval data:** SQuAD 2.0