Complex sentence: The current campus is the third that Roswell High School has occupied and opened in the fall of 1990 on King Road, just off of Highway 92, with an enrollment of nearly 2,000 students.
Split into simpler sentences: The current campus is the third that Roswell High School has occupied. It opened in the fall of 1990 on King Road, just off of Highway 92, with an enrollment of nearly 2,000 students.