Complex sentence: The New York Central took control of the Rochester Railway Company, the Rochester and Eastern Rapid Railway and the Rochester & Sodus Bay Railway in 1905, and the Mohawk Valley Company was formed by the railroad to manage these new acquisitions.
Split into simpler sentences: The New York Central (NYC) began its involvement in 1905 when it took control of the Rochester Railway Company, the Rochester and Eastern Rapid Railway and the Rochester & Sodus Bay Railway. The Mohawk Valley Company was formed by NYC in 1905 to manage these new acquisitions.