By Amy McRary of the Knoxville News Sentinel"The Book of Mormon," playing at the Tennessee Theater through April 10, is bawdy, crass and inappropriate. And clever, funny, hilarious and even sweet at times. What else would you expect from Trey Parker and Matt Stone, the creators of the "South Park" animated television show? They, along with musical comedy "Avenue Q" creator Robert Lopez, wrote the play. "Book of Mormon" is about two young, naive Mormon missionaries sent to convert a Ugandan tribe.