During visualization, the jupyter notebook encountered the following error

[linjunbo123456]

[Errno 2] No such file or directory: './raw/Trajectron++/eth_test_traj++.npz'
[Errno 2] No such file or directory: './raw/Social-STGCNN/save_eth.pkl'
[Errno 2] No such file or directory: './raw/Social-Implicit/save_eth.pkl'
How to obtain this folder and files ..../raw/....