Complex sentence: The Domino Sugar Refinery is a former refinery in the neighborhood of Williamsburg in Brooklyn, New York City was the original refinery of the American Sugar Refining Company, which produced Domino brand sugar.
Split into simpler sentences: The Domino Sugar Refinery is a former refinery in the neighborhood of Williamsburg in Brooklyn, New York City. It was the original refinery of the American Sugar Refining Company, which produced Domino brand sugar.