With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The 2016 Summer Olympics ended on August 21st.
text_B: The 2016 Summer Olympics -LRB- Jogos Olimpicos de Verao de 2016 -RRB- , officially known as the Games of the XXXI Olympiad and commonly known as Rio 2016 , was a major international multi-sport event held in Rio de Janeiro , Brazil , from 5 August to 21 August 2016 .. international. international. multi-sport event. multi-sport event. Rio de Janeiro. Rio de Janeiro. Brazil. Brazil at the 2016 Summer Olympics. More than 11,000 athletes from 205 National Olympic Committees , including first time entrants Kosovo , South Sudan , and the Refugee Olympic Team , took part .. Kosovo. Kosovo at the 2016 Summer Olympics. South Sudan. South Sudan at the 2016 Summer Olympics. Refugee Olympic Team. Refugee Olympic Team at the 2016 Summer Olympics. With 306 sets of medals , the games featured 28 Olympic sports , including rugby sevens and golf , which were added to the Olympic program in 2009 .. Olympic sports. Olympic sports. rugby sevens. rugby sevens. golf. golf. These sporting events took place at 33 venues in the host city , and at five in Sao Paulo , Belo Horizonte , Salvador , Brasilia , and Manaus .. Sao Paulo. Sao Paulo. Belo Horizonte. Belo Horizonte. Salvador. Salvador, Bahia. Brasilia. Brasilia. Manaus. Manaus. These were the first Summer Olympic Games under the International Olympic Committee -LRB- IOC -RRB- presidency of Thomas Bach .. International Olympic Committee. International Olympic Committee. Thomas Bach. Thomas Bach. The host city Rio de Janeiro was announced at the 121st IOC Session in Copenhagen , Denmark , on 2 October 2009 .. Rio de Janeiro. Rio de Janeiro. 121st. 121st IOC Session. IOC Session. List of IOC meetings. Copenhagen. Copenhagen. Denmark. Denmark. Rio became the first South American city to host the Summer Olympics .. These were the first games to be held in a Portuguese-speaking country , the first to be held entirely in the host country 's winter , the first since 1968 to be held in Latin America , and the first since 2000 to be held in the Southern Hemisphere .. Portuguese-speaking country. Community of Portuguese Language Countries. 1968 Summer Olympics. 2000 Summer Olympics. Southern Hemisphere. Southern Hemisphere. The lead-up to these Games was marked by controversies , including the instability of the country 's federal government ; the countries ' problems with inequality ; health and safety concerns surrounding the Zika virus and significant pollution in the Guanabara Bay ; and a doping scandal involving Russia , which affected the participation of its athletes in the Games .. controversies. Concerns and controversies at the 2016 Summer Olympics. Zika virus. Zika virus. Guanabara Bay. Guanabara Bay. doping scandal. Doping in Russia. Russia. Russia at the 2016 Summer Olympics. The United States topped the medal table for the fifth time in the past six Summer Olympics , winning the most golds -LRB- 46 -RRB- and most medals overall -LRB- 121 -RRB- , as well as its 1,000 th Olympic gold medal overall .. United States. United States at the 2016 Summer Olympics. medal table. 2016 Summer Olympics medal table. Great Britain finished second and became the first country in the history of the modern Olympics to increase its tally of medals in the subsequent games after being the host nation .. Great Britain. Great Britain at the 2016 Summer Olympics. host nation. Great Britain at the 2012 Summer Olympics. China finished third .. China. China at the 2016 Summer Olympics. Host country Brazil won seven gold medals , its most at any single Summer Olympics , finishing in thirteenth place .. Brazil. Brazil at the 2016 Summer Olympics. Bahrain , Fiji , Jordan , Kosovo , Puerto Rico , Singapore , Tajikistan , Ivory Coast and Vietnam each won their first gold medals , as did the group of Independent Olympic Athletes -LRB- from Kuwait -RRB- .. Kosovo. Kosovo at the 2016 Summer Olympics
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