Complex sentence: HMS "Cydnus" was one of eight 38-gun "Cydnus" Class Fifth Rate frigates of the Royal Navy, built in 1813 at Blackwall Yard, London, and broken up in 1816.
Split into simpler sentences: HMS "Cydnus" was one of eight Royal Navy 38-gun "Cydnus"-class fifth-rates. This frigate was built in 1813 at Blackwall Yard, London, and broken up in 1816.