Question: Who is older Franz Viehböck or  Umberto Guidoni ?

Context articles: Franz Viehböck
Franz Ferdinand Benary
Unite the Left
Francis, Duke of Pomerania
The King Steps Out
Alexander Schenk Graf von Stauffenberg
Bolivian literature
Umberto Guidoni
Prince Alfred of Liechtenstein
Princess Maria Pia of Bourbon-Parma

Franz Artur Viehböck (born August 24, 1960 in Vienna) is an Austrian electrical engineer, and was Austria's first cosmonaut.
 He was titulated "„Austronaut“" by his country's media.
 He visited the Mir space station in 1991 aboard Soyuz TM-13, returning aboard Soyuz TM-12 after spending just over a week in space.
Franz Ferdinand Benary (22 March 1805, Kassel – 7 February 1880, Berlin) was a German orientalist and exegete.
 He was the older brother of classical philologist Agathon Benary.
Unite the Left ("Unire la Sinistra") was a minority faction within the Party of Italian Communists (PdCI), a political party in Italy.
 Its leaders included former minister Katia Belillo and MEP Umberto Guidoni.
Francis of Pomerania (in the older literature sometimes referred to as "Francis I of Pomerania"; German: "Franz von Pommern" ; 24 March 1577 in Barth – 27 November 1620 in Stettin (Szczecin)) was Duke of Pomerania-Stettin and Bishop of Cammin.
The King Steps Out is a 1936 American light comedy film directed by Josef von Sternberg based on the early years of Empress Elisabeth of Austria, known as "Sisi" or "Sissi", and her courtship and marriage to Franz Joseph I of Austria, after he was initially engaged to her older sister Duchess Helene in Bavaria.
Alexander Franz Clemens Maria Schenk Graf von Stauffenberg (15 March 1905 in Stuttgart – 27 January 1964 in Munich) was a German aristocrat and historian.
 His older twin brother Berthold Schenk Graf von Stauffenberg and youngest brother Claus Schenk Graf von Stauffenberg were among the leaders of the 20 July Plot against Hitler in 1944.
The constant political turmoil that Bolivia has experienced throughout its history has slowed the development of Bolivian literature.
 Many talents have had to emigrate or were silenced by the internal conflict.
 In recent years the literature of Bolivia has been in a process of growth, with the appearance of new writers.
 Older writers such as Adela Zamudio, Oscar Alfaro, and Franz Tamayo continue to be important.
Umberto Guidoni (born in Rome 18 August 1954) is an Italian astrophysicist, science writer and a former ESA astronaut, being the first European to visit the International Space Station.
 He is a veteran of two NASA space shuttle missions.
 He was also a Member of the European Parliament (MEP) from 2004 to 2009, elected within the Party of Italian Communists.
Prince Alfred Louis of Liechtenstein (Alfred Aloys Eduard; 11 June 1842, in Prague – 8 October 1907, in Frauenthal castle) was the son of Prince Franz de Paula of Liechtenstein (1802–1887) and Countess Julia Eudoxia Potocka-Piława (1818–1895), older brother of Prince Louis of Liechtenstein, and cousin and brother-in-law of Franz I of Liechtenstein.
Princess Maria Pia of Bourbon-Parma (née Princess Maria Pia of Savoy; born 24 September 1934) is the eldest daughter of Umberto II of Italy and Marie-José of Belgium.
 She is the older sister of Princess Maria Gabriella of Savoy, Vittorio Emanuele, Prince of Naples, and Princess Maria Beatrice of Savoy.