See note on previous notebook about moving this credit to the end of the document. Also this one nicely says where the document was forked from. Your previous notebook doesn't say that. Do you know why? We might want to fix it so that the forking is mentioned right at the top.

We shouldn't refer to the previous notebooks. I don't know what it means to "follow the material". My sense is that we are introducing this here for exercises. I don't think we need to do that. We can just introduce the dataset the first time we need it. But I wonder if we really need to have a separate dataset.