Complex sentence: Dover Turret, also known as the Admiralty Pier Turret, is an 1882 enclosed armoured turret built on the western breakwater of Dover harbour, it contains 2 16,80 ton guns, the biggest installed in the United Kingdom.
Split into simpler sentences: Dover Turret, also known as the Admiralty Pier Turret, is an enclosed armoured turret built in 1882 on the western breakwater of Dover harbour. It contains 2 × 16,80-ton guns, the biggest installed in the United Kingdom.