Complex sentence: From 1843 to 1873 water was privately provided by Furniss Works or Toronto Water Works, a subsidiary of Toronto Gas Light and Water Company, which was owned by Montreal businessman Albert Furniss.
Split into simpler sentences: From 1843 to 1873 water was privately provided by Furniss Works or Toronto Water Works. A subsidiary of Toronto Gas Light and Water Company, which was owned by Montreal businessman Albert Furniss.