Powerdog

### 🐛 Describe the bug code: `from torch_geometric.datasets import QM9 ` `path = './dataset/QM9'` `dataset = QM9(path)` bug: Downloading https://deepchemdata.s3-us-west-1.amazonaws.com/datasets/molnet_publish/qm9.zip Extracting dataset\QM9\raw\qm9.zip Downloading https://ndownloader.figshare.com/files/3195404 Traceback (most recent call last): File...

I couldn't understand "the indices of M neighbors of each atom" Could you give me a simple example about the matrix of "nbr_fea_idx". Thank you!