How are TCGA Labels Acquired?

[nauyan]

First of all, I would like to appreciate all the hard work that has been put into this research article.

Moving to the problem. So, I was going through the GDC tool for downloading Diagnostic Slides for patients however I was not able to find the label site label i.e primary or metastatic? I have read your paper multiple times to understand how to extract labels but the instructions are not very clear and also went through the documentation of the TCGA GDC portal but was unable to find it.

Therefore could you point out on how you were able to extract labels typically site i.e primary pr metastatic?

I would really appreciate the help. Thanks