Complex sentence: The New York Central Railroad Niagara was a type of steam locomotive named after the Niagara River and Falls.They were express mixed traffic locomotives with a wheel arrangement of 4-8-4 in the Whyte notation.
Split into simpler sentences: The New York Central Railroad's Niagara was a steam locomotive named after the Niagara River and Falls. It had a wheel arrangement of 4-8-4 in the Whyte notation.