Question: Wonder World is the second studio album by a pop group formed by what producer?
Related documents: [0]  [DOC] Wonder Girls () was a South Korean girl group and band formed by producer Park Jin-young under JYP Entertainment in 2006, which debuted in 2007. The group's final line-up consisted of Yubin, Yeeun, Sunmi and Hyerim. Members Sunye and Sohee officially left the group in 2015, while Hyuna left in late 2007. They were co-managed in the United States by Creative Artists Agency. [END] 
[1]  [DOC] Wonder World is the second studio album by South Korean pop girl group Wonder Girls. It was released on November 7, 2011. It was produced by Park Jin-Young. "Be My Baby" served as the lead single from album. Both album and single were commercial success. Album was promoted with a "Wonder World Tour" in 2012. Members were more involved in songwriting in production: Park Yeeun wrote and produced "G.N.O." and "Me, In", Kim Yubin wrote "Girls Girls", "Me, In" and "Sweet Dreams" while Woo Hyelim wrote and produced her solo song "Act Cool", featuring San E. Members also recorded duets: Min Sunye and Yeeun recorded "Long Long Time" while Yubin and Ahn Sohee recorded "SuperB". [END] 
Answer: 
Park Jin-young
Park Jin-young