Both John Frost and Adolph Malan were from which country?
John Frost (SAAF officer) John Everitt "Jack" Frost, (16 July 1918 – missing in action 16 June 1942) was a South African fighter ace during the Second World War. He was the highest-scoring member of a South African Air Force squadron during the war, credited with the destruction of 15 Axis aircraft. South African pilots with higher numbers of kills, such as Pat Pattle and Adolph "Sailor" Malan, were members of the British Royal Air Force.
John Lindgren John Halvar Theofron Lindgren (8 November 1899 – 30 January 1990) was a Swedish cross country skier who won the 1927 world titles in the 18 km and 50 km events. He finished eighth in the 50 km race at the 1932 Winter Olympics. His younger brother Ivan was also an Olympic cross-country skier.