Update app.py

app.py

@@ -141,6 +141,10 @@ Vanity Fair. A novel without a hero ... With all the original illustrations by t
 
 You can see that the model gets a bit of help with the genre here 😉. Since the model was trained for a very particular dataset and task it might not work well on titles that don't match this original corpus. 
 
+## XXMAJ? 
+
+You may see some strange tokens in the output. These are tokens used by fastai to indicate particularly things about the text. `xxmaj` is used to indicate the next word begins with a capital in the original text `xxbos`. These can be quite important for helping the model make predictions. As an example, you can try `oliver twist` and `Oliver Twist` and see how the results of the model change. 
+
 
 ## Background