Hello, I am trying to download the data used in a specific paper to benchmark the performance of their model. The paper I am referring to is "Classification of Cancer Types Using Graph Convolutional Neural Networks" (https://www.frontiersin.org/articles/10.3389/fphy.2020.00203/full). In the Data preparation section of the paper, it is mentioned that they downloaded 11,071 data samples in December 2018. I want to download the data for that specific period, but I don't know how to do it. I am not very familiar with using Github, so I would appreciate it if you could guide me on how to download the data from either the GDC portal or Github (https://github.com/RicardoRamirez2020/GCN_Cancer). Thank you very much.