What was the release date of a song by  Bae Su-ji that sold more than 1.3 million copies?
Dream (Suzy and Baekhyun song): "Dream" is a song recorded by South Korean singers Suzy and Baekhyun, members of K-pop groups miss A and EXO respectively. Bae Suzy: Bae Su-ji (; born October 10, 1994), better known by the mononym Suzy, is a South Korean singer and actress.
i don't know