About the CNN Model in your paper

[0215Arthur]

Hi, I have read your paper <Two-stage Model for Automatic Playlist Continuation at Scale>. It's so great. After reading, I also watch your github project. I don't see the part of the CNN function ,and the cnn model is an important part of the Recsys, so I just want to know how you construct the CNN model ,what's output of the CNN , and how to get the score of CNN?