Question: Hans Jörg Schelling served under which chairman of the Social Democratic Party of Austria?

Context paragraphs:
Old Social Democratic Party of Germany: The Old Social Democratic Party of Germany (German: "Alte Sozialdemokratische Partei Deutschlands" ), known as the Old Social Democratic Party of Saxony (German: "Alte Sozialdemokratische Partei Sachsens" ) until 1927, was a political party in Germany.  The party was a splinter group of the Social Democratic Party of Germany (SPD) in Saxony, and had nationalistic tendencies.  Whilst the party failed to become a mass party, it played a significant role in regional politics in Saxony during the latter half of the 1920s.  A leader of the party, Max Heldt, served as Minister-President of Saxony 1926-1929.  Wilhelm Buck was the chairman of the party.

Polish Social Democratic Party of Galicia: Polish Social Democratic Party of Galicia (Polish: "Polska Partia Socjalno-Demokratyczna Galicji" ) was a political party in Galicia.  The party was formed in 1890 as the Galician territorial organization of the Social Democratic Workers Party of Austria.  In 1892 it took the name Social Democratic Party of Galicia ("Galicyjska Partia Socjaldemokratyczna" or "Socjaldemokratyczna Partia Galicji").  After an 1899 split, which led to the formation of the Ukrainian Social Democratic Party, the word <nowiki>'</nowiki>Polish<nowiki>'</nowiki> was added to the party name.  It was also known as Polish Social Democratic Party of Galicia and Cieszyn Silesia ("Polska Partia Socjalno-Demokratyczna Galicji i Śląska Cieszyńskiego").  From 1904 it closely worked with Polish Socialist Party, into which it was merged in 1919.

Popular Movement for the Good of Borlänge: Popular Movement for the Good of Borlänge (Swedish: "Folkrörelsen för Borlänges Bästa" ) commonly referred to as FBB was a local municipal party in Borlänge.  The party formed because new ideas among members that did not conform to Borlänge's Social Democratic Party board were not allowed by the Social Democratic Party.  Members of FBB were either unhappy with the Social democratic governing of Borlänge or they were former rejected members of the Social Democratic Party.

Julius Gehl: Julius Gehl (July 4, 1869, Bromberg, Province of Posen - March 1945, Danzig) was a German social democratic politician.  Gehl served as the Chairman of the West Prussian District League of the Social Democratic Party of Germany (SPD).  Gehl was a prominent leader of the Social Democratic Party of the Free City of Danzig during the interbellum years, serving as its chairman and parliamentary faction leader.  Gehl also served as Vice President of the Senate of the Free City.

Romanian Social Democratic Party (1990–2001): The Romanian Social Democratic Party (Romanian: "Partidul Social Democrat Român" , PSDR) was a social-democratic political party in Romania.  Founded in 1990, after the fall of the Communist party rule in Romania, it claimed to be the direct successor of the Romanian Social Democratic Party existing between 1927 and 1948, when it had merged with the Communist Party of Romania to create the Romanian Workers' Party.  Joining the Socialist International, the party entered alliances with the Democratic Party (forming "Uniunea Social-Democrată" during the 1996 legislative election), and took part in the Romanian Democratic Convention governments of Victor Ciorbea, Radu Vasile, and Mugur Isărescu (briefly leading the coalition government with Alexandru Athanasiu in 1999).  The PSDR adhered to the Social Democratic Pole of Romania, and fused into the Social Democratic Party on January 16, 2001.

Werner Faymann: Werner Faymann (] ; born 4 May 1960) is a former Austrian politician who was Chancellor of Austria and chairman of the Social Democratic Party of Austria (SPÖ) from 2008 to 2016.  On 9 May 2016, Faymann resigned from both positions amid widening criticism within his party.

Social Democratic Party (Hungary): The Social Democratic Party (Hungarian: "Szociáldemokrata Párt" , SZDP) often known as the "Historic" Social Democratic Party (""történelmi" Szociáldemokrata Párt" , tSZDP) is a small Hungarian political party which no longer contests elections at a national level and only rarely contests elections at a local level, and is widely considered to be practically defunct.  It emerged following a split within the Hungarian Social Democratic Party (MSZDP) in 1989.  Both the SZDP and MSZDP lay claim to the same heritage: the Social Democratic Party which was part of a governing coalition in Hungary between 1945 and 1948, and a short period in 1956, which itself was renamed from the Hungarian Social Democratic Party, previously established in 1890.  Traditional areas of support were the industrial areas of Budapest, especially Obuda, Pesterzsébet and Angyalföld.

Hans Jörg Schelling: Hans Jörg Schelling (born 27 December 1953 in Hohenems , Vorarlberg as Johann Georg Schelling) is an Austrian entrepreneur, Austrian People's Party politician and since 1 September 2014 the Federal Minister of Finance of Austria in the governments of chancellors Werner Faymann and Christian Kern.

Ukrainian Social Democratic Party (1899): Ukrainian Social Democratic Party (USDP) was a political party in Galicia.  The party was founded in 1899 as an autonomous section of the Polish Social Democratic Party of Galicia (and Silesia) by some members of the Polish Social Democratic Party of Galicia (PPSD) and the Ukrainian Radical Party in Lviv.  The key leaders were Mykola Hankevych (party chairman) and Semen Vityk.  It was based on the Ukrainian social democratic organization that already existed since 1897.  The first congress of the party took place in Lviv in 1903.  Few years later in 1906 the party was joined by its affiliate in Bukovina, the Social Democratic Party of Bukovina (leader Yosyp Bezpalko).

Federal Ministry of Finance (Austria): The Federal Ministry of Finance (German: "Bundesministerium für Finanzen" , abbreviated BMF or "Finanzministerium") is the cabinet-level finance ministry of the Austrian Federal Government.  Its seat is at the former city palace of Prince Eugene of Savoy in the Austrian capital Vienna.  The current Federal Minister of Finance is Hans Jörg Schelling (ÖVP).

Supporting paragraphs: Hans Jörg Schelling Werner Faymann
Answer: Werner Faymann