how does the run_squad.py deal with non-answerable questions 
Hi, 

I want to do a similar reading comprehension task with non-answerable questions but i didn't figure out how you deal with it from the codes. Did you add additional token on this?  Or only outputs the no-answer when the start logit = end logit = -1? Thanks! 
@Liangtaiwan and @abeljim were the contributors of the `run_squad.py` example.
Maybe they can help.<|||||>Hi @elephantomkk,

The non-answerable solving is using [CLS] token as the ground truth.
As a result, the start login = and end logit = -1.

You can find it out in this repo code or official Bert code.
Also, the method is mentioned in Jacob Devlin's slide.
https://nlp.stanford.edu/seminar/details/jdevlin.pdf?fbclid=IwAR2TBFCJOeZ9cGhxB-z5cJJ17vHN4W25oWsjI8NqJoTEmlYIYEKG7oh4tlY<|||||>Thanks for the reply! I tested that and found the performance on the non-answerable is not so good compared with the answerables:(