Question: What brand is the football used in the 2018 edition of the event for which the FIFA Confederations Cup is considered a warm up?

full_context: Document 1: 2018 FIFA World Cup: The 2018 FIFA World Cup was the 21st FIFA World Cup, an international football tournament contested by the men's national teams of the member associations of FIFA once every four years. It took place in Russia from 14 June to 15 July 2018. It was the first World Cup to be held in Eastern Europe, and the 11th time that it had been held in Europe. At an estimated cost of over $14.2 billion, it was the most expensive World Cup. It was also the first World Cup to use the video assistant referee (VAR) system.
Document 2: List of FIFA Club World Cup finals: Barcelona and Real Madrid hold the record for most victories, winning the competition three times each since its inception. Teams from Spain have won the tournament the most times, with six winners produced from that nation. The Union of European Football Associations (UEFA) is the most successful confederation of the competition with ten titles earned by six of its clubs. The current champions are Real Madrid, who were defending champions and won their third title, following a 1 -- 0 win against Grêmio in the 2017 FIFA Club World Cup Final at the Zayed Sports City Stadium in Abu Dhabi, United Arab Emirates.
Document 3: 2018 FIFA World Cup: The 2018 FIFA World Cup is the 21st FIFA World Cup, a quadrennial international football tournament contested by the men's national teams of the member associations of FIFA. It is currently ongoing in Russia starting from 14 June and will end with the final match on 15 July 2018. The country was awarded the hosting rights on 2 December 2010.
Document 4: 2019 Copa América: The 2019 Copa América will be the 46th edition of the Copa América, the quadrennial international men's football championship organized by South America's football ruling body CONMEBOL. It will be held in Brazil. The winner of the tournament will earn the right to compete for the 2021 FIFA Confederations Cup. Chile will be the defending champions.
Document 5: 2016 FIFA Club World Cup: The 2016 FIFA Club World Cup (officially known as the FIFA Club World Cup Japan 2016 presented by Alibaba YunOS Auto for sponsorship reasons) was the 13th edition of the FIFA Club World Cup, a FIFA - organised international club football tournament between the champion clubs from each of the six continental confederations, as well as the national league champion from the host country. The tournament was hosted by Japan. Real Madrid won their second Club World Cup, defeating hosts Kashima Antlers in the final.
Document 6: Adidas Telstar 18: Telstar 18 The Adidas Telstar 18. Type Ball Inception 2017 (2017) Manufacturer Adidas (Speed Sports) Available Yes Current supplier Sialkot, Pakistan (official World Cup match balls) Speed Sports Last production year 2018
Document 7: FIFA World Cup qualification: The hosts of the World Cup receive an automatic berth. Unlike many other sports, results of the previous World Cups or of the continental championships are not taken into account. Until 2002, the defending champions also received an automatic berth, but starting from the 2006 World Cup this is no longer the case.
Document 8: 2018 FIFA World Cup: The 2018 FIFA World Cup will be the 21st FIFA World Cup, a quadrennial international football tournament contested by the men's national teams of the member associations of FIFA. It is scheduled to take place in Russia from 14 June to 15 July 2018, after the country was awarded the hosting rights on 2 December 2010.
Document 9: FIFA World Cup: The FIFA World Cup, often simply called the World Cup, is an international association football competition contested by the senior men's national teams of the members of the Fédération Internationale de Football Association (FIFA), the sport's global governing body. The championship has been awarded every four years since the inaugural tournament in 1930, except in 1942 and 1946 when it was not held because of the Second World War. The current champion is France, which won its second title at the 2018 tournament in Russia.
Document 10: 2018 FIFA World Cup: The 2018 FIFA World Cup will be the 21st FIFA World Cup, a quadrennial international football tournament contested by the men's national teams of the member associations of FIFA. It is scheduled to take place in Russia from 14 June to 15 July 2018, after the country was awarded the hosting rights on 2 December 2010. This will be the first World Cup held in Europe since the 2006 tournament in Germany; all but one of the stadium venues are in European Russia, west of the Ural Mountains to keep travel time manageable.
Document 11: 2018 FIFA World Cup: The 2018 FIFA World Cup was the 21st FIFA World Cup, an international football tournament contested by the men's national teams of the member associations of FIFA once every four years. It took place in Russia from 14 June to 15 July 2018.
Document 12: 2018 FIFA World Cup: The 2018 FIFA World Cup will be the 21st FIFA World Cup, a quadrennial international football tournament contested by the men's national teams of the member associations of FIFA. It is scheduled to take place in Russia from 14 June to 15 July 2018, after the country was awarded the hosting rights on 2 December 2010. This will be the first World Cup held in Europe since 2006; all but one of the stadium venues are in European Russia, west of the Ural Mountains to keep travel time manageable.
Document 13: Adidas Telstar 18: The Adidas Telstar 18 was the official match ball of the 2018 FIFA World Cup, which was held in the Russian Federation. It is designed by the company Adidas, a FIFA Partner and FIFA World Cup official match ball supplier since 1970, and based on the concept of the first Adidas's World Cup match ball.
Document 14: Association football: After the World Cup, the most important international football competitions are the continental championships, which are organised by each continental confederation and contested between national teams. These are the European Championship (UEFA), the Copa América (CONMEBOL), African Cup of Nations (CAF), the Asian Cup (AFC), the CONCACAF Gold Cup (CONCACAF) and the OFC Nations Cup (OFC). The FIFA Confederations Cup is contested by the winners of all six continental championships, the current FIFA World Cup champions and the country which is hosting the Confederations Cup. This is generally regarded as a warm-up tournament for the upcoming FIFA World Cup and does not carry the same prestige as the World Cup itself. The most prestigious competitions in club football are the respective continental championships, which are generally contested between national champions, for example the UEFA Champions League in Europe and the Copa Libertadores in South America. The winners of each continental competition contest the FIFA Club World Cup.
Document 15: Association football: The major international competition in football is the World Cup, organised by FIFA. This competition takes place every four years since 1930 with the exception of 1942 and 1946 tournaments, which were cancelled due to World War II. Approximately 190–200 national teams compete in qualifying tournaments within the scope of continental confederations for a place in the finals. The finals tournament, which is held every four years, involves 32 national teams competing over a four-week period. The World Cup is the most prestigious association football tournament in the world as well as the most widely viewed and followed sporting event in the world, exceeding even the Olympic Games; the cumulative audience of all matches of the 2006 FIFA World Cup was estimated to be 26.29 billion with an estimated 715.1 million people watching the final match, a ninth of the entire population of the planet. The current champion is France, which won its second title at the 2018 tournament in Russia. FIFA Women's World Cup has been held every four years since 1991. Under the tournament's current format, national teams vie for 23 slots in a three-year qualification phase. (The host nation's team is automatically entered as the 24th slot.) The current champion is the United States, after winning their third title in the 2015 FIFA Women's World Cup.
ground_truth: Adidas Telstar 18
sub_queries: The FIFA Confederations Cups is usually considered a warm-up for what? Answer: FIFA World Cup
name of football of 2018 FIFA World Cup Answer: Adidas Telstar 18