Question: Sweet Girl is the sixth mini-album released by which organization, under WM Entertainment, the  title song of the album, "Sweet Girl", along with the other songs, was produced by leader   professionally known as Jinyoung, is a South Korean singer, songwriter, record producer, and actor, given name is Jung Jin-young?
Sentence (from "Solo Day"): Solo Day is the fifth mini-album released by B1A4 under WM Entertainment.
Relevant evidence: No