Complex sentence: In July 1911, the GCG&N and its entire line came under Atchison, Topeka, and Santa Fe Railway control, and the ATSF operated the line until September 7,1989, when GCN took over the line.
Split into simpler sentences: In July 1911, the GCG&N and its entire line came under Atchison, Topeka and Santa Fe Railway (ATSF) control. The ATSF operated the line until September 7,1989, when GCN took over the line.