Complex sentence: Admiral of the Fleet Sir George Rose Sartorius (9 August 1790--13 April 1885) was an officer of the British Royal Navy who served during the Napoleonic Wars, and later commanded the navy of Dom Pedro in the Portuguese Civil Wars.
Split into simpler sentences: Admiral of the Fleet Sir George Rose Sartorius (9 August 1790--13 April 1885) was an officer of the British Royal Navy. He later commanded the navy of Dom Pedro in the Portuguese Civil Wars.