Besides, we also use two of its adversarial sets, namely AddSent and AddOneSent BIBREF6 , to evaluate the robustness to noise of MRC models. The passages in the adversarial sets contain misleading sentences, which are aimed at distracting MRC models.  Specifically, we not only evaluate the performance of KAR on the development set and the test set, but also do this on the adversarial sets.  
 Question: How do the authors examine whether a model is robust to noise or not?
By evaluating their model on adversarial sets containing misleading sentences