Predefined token classification 
Hello, 
I am just wondering if "BertForTokenClassification"  can be modified to classify predefined tokens (just targeted tokens). E.g. in NER it identifies the entity and then classify it, but in my case I want to classify the targeted tokens only in a sentence with a predefined labels. I thought of adding the targeted token in the sentence to the end of the sentence to let the model knows this is the targeted token but I am sure it is not a good idea because I need to again add a label for the added token. (silly Q I know :)
Any idea on how to approach it? I feel that NER task "BertForTokenClassification" 
model can be modified to achieve it but do not know how. 
Thanks 
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