Question: The Eurovision Song Contest 2009 was held at a stadium originally built for which Olympics?
Context: The Eurovision Song Contest 2009 was the 54th edition of the annual Eurovision Song Contest and was hosted by Russia after their win in 2008.  It took place between 12 and 16 May 2009 at the Olympic Indoor Arena in Moscow, Russia. Latvia participated in the Eurovision Song Contest 2009, marking its tenth entrance to Eurovision.  Originally, after budget cuts were made by the Latvian government on the Latvian broadcaster, Latvijas Televīzija (LTV), announced plans to withdraw from the Eurovision Song Contest 2009 in Russia, but on 12 January 2009 it was announced by the European Broadcasting Union (EBU) that Latvia will participate. The use of a Kids' Jury in the Junior Eurovision Song Contest was first introduced at the Junior Eurovision Song Contest 2012, in Amsterdam, Netherlands, as part of a new voting system for the Junior Eurovision Song Contest following discussions between the European Broadcasting Union (EBU), KidsRights Foundation, and the Junior Eurovision Song Contest 2012 host broadcaster Algemene Vereniging Radio Omroep (AVRO).  Three of the four spokespersons who announced the jury points at each annual contest were former winners of the Junior Eurovision Song Contest.  As of 2016, the results of each country's Kids' Jury have been integrated with the adult jury to give out two sets of 1-8, 10, and 12 points per country. Tijana Bogićević (, ] , born 1 November 1981) is a Serbian singer.  She represented Serbia in the Eurovision Song Contest 2017 with the song "In Too Deep" but failed to qualify to the final.  Bogićević was previously a backing vocalist for Nina at the Eurovision Song Contest 2011.  She also competed to represent Serbia in the Eurovision Song Contest 2009 through Beovizija 2009, but did not advance past the semi-final. Poland participated in the Eurovision Song Contest 2009, as confirmed by Polish broadcaster Telewizja Polska (TVP).  TVP continued to use the "Piosenka dla Europy" contest to select the Polish representative for the 2009 contest in Moscow.  The 2009 edition of the contest was held on 14 February, with the winner decided by jury and televoting.  The winner was Lidia Kopania with "I Don't Wanna Leave", represented Poland at the Eurovision Song Contest 2009 in May 2009. Marija Šerifović (Serbian: Марија Шерифовић , , born 14 November 1984) is a Serbian singer.  She won the Eurovision Song Contest 2007 with the song "Molitva".  Šerifović is the daughter of Verica Šerifović, also a notable singer.  She was also one of the judges on Eurosong to choose the Irish entry for Eurovision Song Contest 2008 and sang Molitva to close the show.  She was also a member of the International Jury in Melodifestivalen 2009, the selection for the Swedish entry to Eurovision Song Contest 2009. Nela Pocisková (October 4, 1990 in Bratislava) is a Slovak singer and actress who was the Slovak entry for the Eurovision Song Contest 2009 with Kamil Mikulčík.  The song Leť tmou was chosen after a national final.  They were the first singers to represent Slovakia at the contest since the Eurovision Song Contest 2009 but failed to reach the Eurovision final. The participation of Portugal in the Junior Eurovision Song Contest first began at the Junior Eurovision Song Contest in 2006 which took place in Bucharest, Romania.  Rádio e Televisão de Portugal (RTP), a member of the European Broadcasting Union (EBU), were responsible for the selection process of their participation.  Portugal used a national selection format, broadcasting a show entitled ""Festival da Canção Junior"", for their participation at the contests.  This was a junior version of Festival da Canção, the national music competition organised by broadcaster RTP to choose the Portuguese entry for the Eurovision Song Contest.  The first representative to participate for the nation at the 2006 contest was Pedro Madeira with the song "Deixa-me sentir", which finished in second-last place out of fifteen participating entries, achieving a score of twenty-two points.  Portugal withdrew from competing in the Junior Eurovision Song Contest in 2008, and will return for the Junior Eurovision Song Contest 2017 in Tbilisi, Georgia. The Junior Eurovision Song Contest 2009 was the seventh edition of Junior Eurovision Song Contest and took place in Kiev, Ukraine.  It was scheduled for 21 November.  13 countries were confirmed by the European Broadcasting Union (EBU) to compete in the Contest.  The contest was won by Ralf Mackenbach for the Netherlands with the song "Click Clack".  At the age of 14, he is the oldest person to win the Junior Eurovision Song Contest in its seven-year history.  He was joined by Italy's Vincenzo Cantiello who won the 2014 contest also at the age of 14.  Luara Hayrapetyan achieved Armenia another second place.  Ekaterina Ryabova also took second place for Russia. Olympic Stadium, known locally as the Olimpiyskiy or Olimpiski, is a large indoor arena, located in Moscow, Russia.  It was built for the 1980 Summer Olympics and, divided into two separated halls, hosted the basketball and boxing events.
Answer: 1980 Summer Olympics