added expansion image

README.md

@@ -57,9 +57,9 @@ Getting pros of both searches made sense and that gave rise to interest in learn
 
 4. What a Sparse model learns ?
 
-The model learns to project it's learned dense representations over a MLM head to give a vocabulary distribution. 
+The model learns to project it's learned dense representations over a MLM head to give a vocabulary distribution. Which is just to say the model can do automatic token expansion. (Image courtesy of pinecone)
 
-  
+<img src="./expansion.png" width=650 height=500/>
   
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