Complex sentence: In 1811, Andrew Ellicott made a survey for the State of Georgia to resolve the boundary dispute between Georgia (U.S. State) and North Carolina and marked a large rock in the Chattooga River with "NC-GA", standing for North Carolina-Georgia.
Split into simpler sentences: In 1811, Andrew Ellicott made a survey for the State of Georgia to resolve the boundary dispute between Georgia and North Carolina. He marked a large rock in the Chattooga River with "NC-GA", standing for North Carolina-Georgia.