Question: Sweet Girl is the sixth mini-album released by B1A4 under WM Entertainment, the  title song of the album, "Sweet Girl", along with the other songs, was produced by which South Korean singer, songwriter, record producer, and actor?
Sentence (from "Jung Jin-young (singer)"): He is the leader and vocalist of the South Korean boy group B1A4 under WM Entertainment, and has also gained recognition with the television series "Love in the Moonlight" (2016).
Relevant evidence: No