Complex sentence: The Princes Dock is a dock, on the River Mersey and part of the Port of Liverpool it is situated in the northern end of the dock system, connected to Princes Half Tide Dock to the north.
Split into simpler sentences: The Princes Dock is a dock, on the River Mersey and part of the Port of Liverpool. It is situated in the northern end of the dock system, connected to Princes Half Tide Dock to the north.