Whether to use domain labels

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Thanks for your great work and sharing. I have a question to ask you. In this article, K-L divergence is used to calculate the difference between the final and randomly sampled class tokens. What I want to know is whether Domain Label is used in this process? That is to say, is it clear which domain each sample belongs to, for example, the sample belongs to Cartoon or Sketch. Looking forward to your reply. Thanks.