Instructions: In this task, you are given a public comment from online platforms. You are expected to classify the comment into two classes: identity-attack and non-identity-attack. Identity attack refers to anything rude or disrespectful about someone's identity, including appearance, race, gender, and sexual orientation.
Input: Comment: We used to hang slaves. We used to burn non-Christians. We used to slaughter American Indians.

Ahhh...the good ol' days.... /s
Output:
Identity-attack