Question: The Emerald Mound Site (22 AD 504), also known as the "Selsertown site", is a Plaquemine culture Mississippian period archaeological site located near Stanton, on the Natchez Trace Parkway,is a National Parkway in the southeastern United States that commemorates the historic Old Natchez Trace and preserves sections of the original trail, are in which state? 
Sentence (from "Natchez Trace Parkway"): Access to the parkway is limited, with more than fifty access points in the states of Mississippi, Alabama, and Tennessee.
Relevant evidence: No