How much sleep should I get a night?

"Where Did You Sleep Last Night," also known as "In The Pines" and "Black Girl," is a traditional American folk song which dates back to at least the 1870s, and is believed to be Southern Appalachian in origin. The identity of the song's author is unknown, but it has been performed by a number of artists, including Lead Belly, Bill Monroe, Doc Watson, Pete Seeger, Bob Dylan, Chet Atkins, Grateful Dead, Connie Francis, Mark Lanegan, Nirvana, Dolly Parton, and Smog.