Who was the head coach whose team were first year members in a collegiate athletic conference whose member institutions are located within the Southern United States?
2014–15 WKU Lady Toppers basketball team:  They play their home games at E. A. Diddle Arena and were first year members of Conference USA. Conference USA: Conference USA (C-USA or CUSA) is a collegiate athletic conference whose member institutions are located within the Southern United States.
i don't know