Why in all arch settings, KNN is disabled?

[Rasoul77]

Hello,
Thanks for sharing your great work!
When I look at the provided arch-yaml files for semantic task, I can observe that in all of them KNN as post processing is disabled, and instead you use CRF (at least for training phase). On the other hand, you have described the KNN post processing in details in the paper (Algo 1). I am confused about the results reported in the paper. Are they achieved by KNN or CRF post processing?