Complex sentence: The Great Northern Railrod crossed the Mississippi River on the Stone Arch Bridge near the Falls of Saint Anthony (the only waterfall on the Mississippi) in Minneapolis, built in 1883 by railroad tycoon James J. Hill.
Split into simpler sentences: The Great Northern Railroad crossed the Mississippi River on the Stone Arch Bridge near the Saint Anthony Falls (the only waterfall on the Mississippi) in Minneapolis. The bridge was built in 1883 by railroad tycoon James J. Hill.