How to use external gene embedding in CPA?

[weizhiting]

Thanks for the great jobs!

In the tutorial, you mentioned that "if we want to use CPA to predict X+Y when either X, Y, or both are unseen" in predicting Crispr perturbation, we need to use external gene embedding, but I cannot figure out how to provide this to CPA although I follows the drug example you referred? So, could you give a more detailed example about providing gene embedding to CPA? 

Thanks for your reply.