When did the boy band that Dong Young-bae is a member of debut?
Big Bang filmography:  Consisting of members G-Dragon, T.O.P, Taeyang, Daesung, and Seungri, the group officially debuted on August 19, 2006. Taeyang: Dong Young-bae (; born 18 May 1988), better known by his stage name Taeyang (meaning "sun" in Korean) and SOL (when performing in Japan), is a South Korean singer, songwriter and dancer.
i don't know