[Enhancement]: Dataset in A1

[HongleiXie]

Describe your issue

It's not a bug but enhancement we can make for future cohorts. It's about the dataset choice in A1 where it's a multi-class classification while in class we only introduced binary classification. Suggest to change to binary classification dataset that participants are more familiar with.

Steps to reproduce

NA

What was the expected result?

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Put here the code owner you'd like to review this issue.

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