Input (grade 13): Sir William "Billy" McMahon, GCMG, CH (23 February 1908 31 March 1988) was an Australian Liberal politician and the 20th Prime Minister of Australia Early life McMahon was born in Sydney, New South Wales, where his father was a lawyer.
Output (grade 7): Sir William McMahon (23 February 1908 - 31 March 1988) was the 20th Prime Minister of Australia.