Question: Both John Frost and Adolph Malan were from which country?

Context paragraphs:
John Frost Bridge: John Frost Bridge ("John Frostbrug" in Dutch) is the road bridge over the Lower Rhine at Arnhem, in the Netherlands.

Shire Hall, Monmouth: The Shire Hall in Agincourt Square, Monmouth, Wales, is a prominent Grade I listed building in the town centre.  It was built in 1724, and was formerly the centre for the Assize Courts and Quarter Sessions for Monmouthshire.  In 1839/40, the court was the location of the trial of the Chartist leader John Frost and others for high treason for their part in the Newport Rising.  The building was also used as a market place.  The Shire Hall is owned by Monmouthshire County Council and has audiovisual guides for visitors to Courtroom 1.  It is currently used as a Tourist Information Centre and as the offices for Monmouth Town Council, and is open to the public in part.

John Frost (footballer): John Frost (born 20 May 1980) is an Irish professional footballer who last played for Waterford United in the League of Ireland In 2017 Frost returned to the RSC as a coach to Alan Reynolds.

Ten Rules for Air Fighting: Adolph Gysbert Malan DSO & Bar DFC (24 March 1910 – 17 September 1963), better known as Sailor Malan, was a South African World War II fighter pilot who led No. 74 Squadron RAF during the height of the Battle of Britain.  Malan developed a set of simple rules for fighter pilots, which eventually could be found throughout RAF Fighter Command:

John Frost High School: The John Frost School formally known as "Duffryn High School" (Welsh: "Ysgol Uwchradd Dyffyrn") is a comprehensive school on the south-western outskirts of Newport, south Wales.  It is in the suburb of Duffryn and opened in 1959.  The John Frost School was the filming location of the Doctor Who episode School Reunion, filmed in late-summer 2005.  In 2014 the school and many others around Wales worked with BBC Radio Wales and some of the student performed and were host during Children in Need.

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.

H. A. Frost: Henry Adolph Frost (1844 – 21 July 1909) was a German-born saddler and businessman known for his association with the company which eventually produced the Holden automobile.  His name may have been originally Heinrich Friedrich Adolphe Frost, but he evidently preferred "Adolph Frost".

John Frost Square: John Frost Square is a large public space in the centre of Newport, South Wales, named after the Chartist leader, John Frost.  It was redeveloped as part of the Friars Walk shopping and leisure complex in 2014 and 2015.

Frost Glacier: Frost Glacier ( ) is a channel glacier flowing to the head of Porpoise Bay, Antarctica.  It was delineated from air photos taken by U.S. Navy Operation Highjump (1946–47), and named by the Advisory Committee on Antarctic Names for John Frost, boatswain on the brig "Porpoise" of the United States Exploring Expedition (1838–42) under Charles Wilkes.

Adolph Malan: Adolph Gysbert Malan, (24 March 1910 – 17 September 1963), better known as Sailor Malan, was a South African fighter pilot and flying ace in the Royal Air Force (RAF) who led No. 74 Squadron RAF during the height of the Battle of Britain.  Under his leadership No. 74 Squadron became one of the RAF's most accomplished squadrons.  Malan scored 27 kills, seven shared destroyed, three probably destroyed and 16 damaged.

Supporting paragraphs: John Frost (SAAF officer) Adolph Malan
Answer: South African