Where is the Datasets in QA Lab Sequence model of Course 5?

In this lab, Transformer Network Application: Question Answering, I click the “Lab files” and download the whole package for this lab, and tired to run it in my local notebook, but it got this error:

And I can’t find the datasets library in the folder as below:

Where can I get the datasets and why can it run in Coursera?

Check this out.