Complex sentence: The more urbanised south, containing cities such as Cardiff, Newport and Swansea, which was historically home to the coal and steel industries, contrasts with the mostly rural north, where agriculture and slate quarrying were the main industries.
Split into simpler sentences: The more urbanised south, containing cities such as Cardiff, Newport and Swansea, was historically home to the coal and steel industries. It contrasts with the mostly rural north, where agriculture and slate quarrying were the main industries.