Simplify the following text for a Grade 8 native English-speaking person.
Original: Alfred Deakin ( 3 August 1856 â `` 7 October 1919 ) , Australian politician , was a leader of the movement for Australian federation and later the second Prime Minister of Australia .
Simplified: Alfred William Deakin ( 3 August 1856 â `` 7 October 1919 ) was the second Prime Minister of Australia .