Complex sentence: In the Natchez Bluffs, the Taensa and Natchez had held out against Mississippian influence and continued to use the same sites as their ancestors and carry on the Plaquemine culture and the Plaquemine culture is considered ancestral to the historic Natchez and Taensa peoples encountered by Europeans.
Split into simpler sentences: In the Natchez Bluffs, the Taensa and Natchez had held out against Mississippian influence and continued to use the same sites as their ancestors and carry on the Plaquemine culture. It is considered ancestral to the historic Natchez and Taensa peoples encountered by Europeans.