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.

Example Input: Comment: No, not common knowledge to the vast majority.  It's simply an opinion held by those who fall for the sore loser propaganda.
Example Output: Non-identity-attack

Example Input: Comment: The denialists are like those mammoths.  Stuck on a shrinking island amidst a sea of information.  Soon they'll all be extinct.  Or learn to swim.
Example Output: Non-identity-attack

Example Input: Comment: So he's a liar, who cares, definitely not his deplorables, lol
Example Output:
Non-identity-attack