Enzyme Data set and GNN Cheatsheet

[akhil969]

I am quite new to this Pytorch Geometric and I am facing a lot of trouble.
1)First thing Can some one please expalin about the enzyme dataset mentioned in the documentation.

2)My second doubt is some one please explain how to understand the GNNcheatsheet mentioned. How can we say that like the particular function will supports the message passing based on the corresponding attributes?
The link for cheatsheet is:
https://pytorch-geometric.readthedocs.io/en/latest/cheatsheet/gnn_cheatsheet.html.
Please clarify these two doubts.