User Input: "When do I use 'who' and when do I use 'whom'?"
GPT Response: "'Who' is used as a subject pronoun, while 'whom' is used as an object pronoun. For example, 'Who is going to the party?' vs. 'Whom are you inviting to the party?' In the first sentence, 'who' is the subject of the verb 'is going,' while in the second sentence, 'whom' is the object of the verb 'are inviting.'"