Complex sentence: Portland cement was developed from natural cements made in Britain beginning in the middle of the 18th century, and its name is derived from its similarity to Portland stone, a type of building stone quarried on the Isle of Portland in Dorset, England.
Split into simpler sentences: Portland cement was developed from natural cements made in Britain beginning in the middle of the 18th century. Its name is derived from its similarity to Portland stone, a type of building stone quarried on the Isle of Portland in Dorset, England.