i met someone whose brother i went to school with.
( i went to school with his/her brother )여기서 whose가 someone 인건가요?
문장 분석이랑 해석 좀 해주세요.

i met a man whose sister knows you. (his sister knows you)

여기 문장도 문장분석이랑 해석부탁드려요.