I have a question. Where are you from?

"궁금한 게 있는데, '어느 나라' 사람이에요?" 어디 나라(x) 어디 is a pronoun. "어디에 살아요?" 어느 is a determiner. "어느 나라에 살아요?"

" I wonder from which country are you ?" Let's break it down 궁금하다 = to wonder 어디 =where 나라=country 사람=person If yoy want to answer you should say " 저는 (your country) 사람입니다.