paragraph_text: The Biblioteca Ayacucho ("Ayacucho Library") is an editorial entity of the government of Venezuela, founded on September 10, 1974. It is managed by the "Fundación Biblioteca Ayacucho". Its name, "Ayacucho", comes from the intention to honor the definitive and crucial Battle of Ayacucho that took place December 9, 1824 between Spain and the territories of the Americas, prior to the full independence of the continent.

paragraph_text: The Arrondissement of Mechelen (; ) is one of the three administrative arrondissements in the Province of Antwerp, Belgium. It is both an administrative and a judicial arrondissement, as the territory for both coincides.

paragraph_text: The Municipio XIX was an administrative subdivision of the city of Rome. Following the administrative reform of 11 March 2013, it was suppressed and merged into the new, and coextensive, Municipio XIV. Its territory is situated to the north-west part of the municipality of Rome.

paragraph_text: Tatra County () is a unit of territorial administration and local government (powiat) in Lesser Poland Voivodeship, southern Poland, on the Slovak border. It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat and only town is Zakopane, which lies south of the regional capital Kraków. The county takes its name from the Tatra mountain range, which covers most of its territory.

paragraph_text: Back in Warsaw that year, Chopin heard Niccolò Paganini play the violin, and composed a set of variations, Souvenir de Paganini. It may have been this experience which encouraged him to commence writing his first Études, (1829–32), exploring the capacities of his own instrument. On 11 August, three weeks after completing his studies at the Warsaw Conservatory, he made his debut in Vienna. He gave two piano concerts and received many favourable reviews—in addition to some commenting (in Chopin's own words) that he was "too delicate for those accustomed to the piano-bashing of local artists". In one of these concerts, he premiered his Variations on Là ci darem la mano, Op. 2 (variations on an aria from Mozart's opera Don Giovanni) for piano and orchestra. He returned to Warsaw in September 1829, where he premiered his Piano Concerto No. 2 in F minor, Op. 21 on 17 March 1830.

paragraph_text: The ZEC Bras-Coupé-Desert is a "zone d'exploitation contrôlée" (controlled harvesting zone) (ZEC), located in the unorganized territory of Lac-Pythonga in La Vallée-de-la-Gatineau Regional County Municipality, in the administrative region of Outaouais, in Quebec, in Canada.

paragraph_text: Khabarovsky District () is an administrative and municipal district (raion), one of the seventeen in Khabarovsk Krai, Russia. It consists of two unconnected segments separated by the territory of Amursky District, which are located in the southwest of the krai. The area of the district is . Its administrative center is the city of Khabarovsk (which is not administratively a part of the district). Population:

paragraph_text: Bani Walid or Ben Walid, prior to 2007, was one of the districts of Libya, administrative town Bani Walid. In the 2007 administrative reorganization the territory formerly in Bani Walid District was transferred to Misrata District.

paragraph_text: In April 2014, the Marussia Motors company was disbanded, with staff leaving to join a government-run technical institute. The Marussia F1 team continued unaffected as a British entity, independent of the Russian car company. However, on 7 November 2014 the administrator announced that the F1 team had ceased trading.

paragraph_text: Jefferson Township is one of seventeen townships in Kosciusko County, Indiana. As of the 2010 census, its population was 2,040 and it contained 677 housing units.

paragraph_text: Warsaw Community High School is a public high school located in Warsaw, Indiana, the county seat of Kosciusko County. It is in the Warsaw Community Schools Corporation. The school's principal is Troy Akers. The current building located on State Road 15 was built in 1990.

paragraph_text: Paea is a commune in the suburbs of Papeete in French Polynesia, an overseas territory of France in the southern Pacific Ocean. Paea is located on the island of Tahiti, in the administrative subdivision of the Windward Islands, themselves part of the Society Islands. At the 2017 census it had a population of 13,021.

paragraph_text: The Republic of Užice ( / ) was a short-lived liberated Yugoslav territory and the first liberated territory in World War II Europe, organized as a military mini-state that existed in the autumn of 1941 in occupied Yugoslavia, more specifically the western part of the Territory of the Military Commander in Serbia. The Republic was established by the Partisan resistance movement and its administrative center was in the town of Užice.

paragraph_text: The Neilson River flows into the territory of the municipality of Saint-Raymond, in the Portneuf Regional County Municipality, in the administrative region of the Capitale-Nationale, in Quebec, in Canada.

paragraph_text: James Stokes Millner MD (1830 – 25 February 1875) was a medical practitioner and administrator in the early history of the Northern Territory of Australia.

paragraph_text: Vilnius County () is the largest of the 10 counties of Lithuania, located in the east of the country around the city Vilnius. On 1 July 2010, the county administration was abolished, and since that date, Vilnius County remains as the territorial and statistical unit.

paragraph_text: Biysky District () is an administrative and municipal district (raion), one of the fifty-nine in Altai Krai, Russia. It is located in the east of the krai and borders with Zonalny, Tselinny, Soltonsky, Krasnogorsky, Sovetsky, and Smolensky Districts, as well as with the territory of the City of Biysk. The area of the district is . Its administrative center is the city of Biysk (which is not administratively a part of the district). District's population:

paragraph_text: Local associations of a special kind are an amalgamation of one or more Landkreise with one or more Kreisfreie Städte to form a replacement of the aforementioned administrative entities at the district level. They are intended to implement simplification of administration at that level. Typically, a district-free city or town and its urban hinterland are grouped into such an association, or Kommunalverband besonderer Art. Such an organization requires the issuing of special laws by the governing state, since they are not covered by the normal administrative structure of the respective states.

paragraph_text: A union territory is a type of administrative division in the Republic of India. Unlike states, which have their own elected governments, union territories are ruled directly by the Union Government (central government), hence the name ``union territory ''. Union territories in India qualify as federal territories, by definition.

paragraph_text: Bogotá (/ ˈboʊɡətɑː /, / ˌbɒɡəˈtɑː /, / ˌboʊ - /; Spanish pronunciation: (boɣoˈta) (listen)), officially Bogotá, Distrito Capital, abbreviated Bogotá, D.C., and formerly known as Santafé de Bogotá between 1991 and 2000, is the capital and largest city of Colombia, administered as the Capital District, although often thought of as part of Cundinamarca. Bogotá is a territorial entity of the first order, with the same administrative status as the departments of Colombia. It is the political, economic, administrative, industrial, artistic, cultural, and sports center of the country.

Question: When did Chopin return to the city contained in the county having Jefferson Township?
Answer: September 1829