Simplify the following text for a Grade 7 native English-speaking person.
Original: Edward Gough Whitlam , AC , QC ( born 11 July 1916 ) , known as Gough Whitlam , served as the 21st Prime Minister of Australia .
Simplified: Edward Gough Whitlam ( born 11 July 1916 ) was the 21st Prime Minister of Australia .