Question: Walkin' is the debut mini-album by which South Korean singer-songwriter and record producer?
Related documents: [0]  [DOC] Shin Su-ran (Hangul: 신수란), also known by her stage names Elena (Hangul: 엘에나) and Baily Shoo (Hangul: 베일리 슈), and better known by the mononym Suran (Hangul: 수란), is a South Korean singer-songwriter and record producer. She debuted as part of the duo, Lodia, on July 9, 2014, with the single "I Got A Feeling". In 2017, she has also appeared on MBC's "King of Mask Singer" (episodes 93–94) as a contestant named "Skip to the End, Hello". [END] 
[1]  [DOC] Walkin' is the debut mini-album by South Korean singer Suran. It was released on June 2, 2017, by Million Market and distribuited by LOEN Entertainment. It consists of five songs, including "Wine" featuring rapper Changmo, previously released as a digital single, and the title track "1+1=0" featuring singer Dean. [END] 
Answer: 
Shin Su-ran
Shin Su-ran