Complex sentence: Blount Mansion (1792), the home of Territorial Governor Blount, is the most historically significant dwelling surviving in Knox County from the pre-statehood era and is the only National Historic Landmark in the county.
Split into simpler sentences: Blount Mansion (1792), the home of Territorial Governor Blount, is the most historically significant dwelling surviving in Knox County from the pre-statehood era. It is the only National Historic Landmark in the county.