Update README.md

README.md

@@ -45,6 +45,7 @@ We are also continuously working on releasing better-performing models, so watch
 ## Intrinsic results
 
 We calculated the _pseudo perplexity_ (PPPL) from [cite](), which is a built-in metric in our distillation library. This metric gives an indication of how well the model captures the input distribution.
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 | Model             | PPPL      |
 |-------------------|-----------|
 | RobBERT (teacher) | 7.76      |