Question: Kim Jae-joong, star of the series Triangle, is best know as a member of what pop group?
Sentence (from "Triangle (2014 TV series)"): "Triangle" was directed by Yoo Cheol-yong and written by Choi Wan-kyu, who previously collaborated on the gambling dramas "All In" (2003) and "Swallow the Sun" (2009).
Relevant evidence: No