Question: In which year was this musician born who belongs to the subgroup of Exo along with Suho, Chanyeol, D.O., Kai, and Sehun?
Sentence (from "Byun Baek-hyun"): He is a member of the South Korean-Chinese boy group EXO, its sub-group EXO-K and sub-unit EXO-CBX.
Relevant evidence: No