Simplify the following text for a Grade 8 native English-speaking person.
Original: Captain Philip Gidley King RN ( 23 April 1758 â `` 3 September 1808 ) was a British naval officer and colonial administrator .
Simplified: Philip Gidley King ( April 23 , 1758 â `` September 3 , 1808 ) was a sailor in the British Royal Navy who became the third Governor of New South Wales .