Complex sentence: The Kings Dock was a dock, on the River Mersey and part of the Port of Liverpool it was situated in the southern dock system, connected to Wapping Dock to the north and Queens Dock to the south.
Split into simpler sentences: The Kings Dock was a dock on the River Mersey and part of the Port of Liverpool. It was situated in the southern dock system, connected to Wapping Dock to the north and Queens Dock to the south.