I've got a question about interrogative/relative pronouns of the quis variety. I have a chart that says quis/quis/quid are the s. nom. interrogative m/f/n pronouns, and that qui/quae/quod are the s. nom. relative m/f/n pronouns. Is that correct? Assuming it is, how can I tell which pronoun to use in a question/answer pair? Example: This example goes on (see below). Here "quis" refers to "servus", and is hence m. They've used an interrogative pronoun. But the next sentence pair is what puzzles me: Why are they using relative pronouns now? Is it because, in the second sentence, the qui introduces a relative clause?