Question: James Jones and John Gunther, are of which nationality?

Context paragraphs:
Inside U.S.A.: Inside U.S.A. is a musical revue by Arthur Schwartz (music) and Howard Dietz (lyrics).  It was loosely based on the book "Inside U.S.A." by John Gunther.  Sketches were written by Arnold M. Auerbach, Moss Hart, and Arnold B. Horwitt.

Earl Snell: Earl Willcox Snell (July 11, 1895 – October 28, 1947) was an American politician, businessman, and member of the Republican Party, serving in the Oregon House of Representatives, as the Oregon Secretary of State, and as the 23rd Governor of Oregon.  American journalist John Gunther described Snell as "genial, mediocre, and perpetually on the fence."

John Gunther: John Gunther (August 30, 1901 – May 29, 1970) was an American journalist and author whose success came primarily through a series of popular sociopolitical works known as the "Inside" books (1936–1972), including the best-selling "Inside U.S.A." in 1947.  He is best known today for the memoir "Death Be Not Proud" about the death of his beloved teenage son, Johnny Gunther, from a brain tumor.

Mátyás Rákosi: Mátyás Rákosi ] (9 March 1892 – 5 February 1971) was a Hungarian communist politician.  He was born Mátyás Rosenfeld in Ada, present-day Serbia.  He was the leader of Hungary's Communist Party from 1945 to 1956 — first as General Secretary of the Hungarian Communist Party (1945–1948) and later holding the same post with the Hungarian Working People's Party (1948–1956).  As such, from 1949 to 1956, he was the "de facto" ruler of Communist Hungary.  An ardent Stalinist, his government was very loyal to the Soviet Union.  American journalist John Gunther described Rákosi as "the most malevolent character I ever met in political life."

James Jones (author): James Ramon Jones (November 6, 1921 – May 9, 1977) was an American novelist known for his explorations of World War II and its aftermath.  He won the 1952 National Book Award for his first published novel, "From Here to Eternity", which was adapted for the big screen immediately and made into a television series a generation later.

Citadel (U.S. Senate): Citadel (sub-title: The Story of the U.S. Senate) is a study of the United States Senate by the journalist William S. White.  Written in 1956, the book anticipates the great changes afoot in post-war Washington.  John Gunther in "Inside U.S.A." had put the problem of Southern intractability over civil rights reform in perspective, but White was the first to make public how skilled the Southern Senators were at utilising every procedural mechanism the chamber had to offer.

Death Be Not Proud (book): Death Be Not Proud is a 1949 memoir by American author John Gunther, taking its name from by John Donne.  The story was portrayed in a 1975 TV movie starring Robby Benson as Johnny Gunther and Arthur Hill as John Gunther.

Inside U.S.A. (book): Inside U.S.A. is a nonfiction book by John Gunther, first published in 1947 and one of that year's best-selling nonfiction books in the United States.  It describes the author's observations during 13 months of travel through the 48 U.S. states beginning in November 1944.

John James Jones: John James Jones (November 13, 1824 – October 19, 1898) was an American politician and lawyer from the state of Georgia who served in the United States Congress.  The John James Jones House is listed on the National Register of Historic Places.

Jan Masaryk: Jan Garrigue Masaryk (14 September 1886 – 10 March 1948) was a Czech diplomat and politician and Foreign Minister of Czechoslovakia from 1940 to 1948.  American journalist John Gunther described Masaryk as "a brave, honest, turbulent, and impulsive man".

Supporting paragraphs: James Jones (author) John Gunther
Answer: American