Question: Which of the countries that competed in the  2017 Asian Quidditch Cup is abbreviated ROK?

Context paragraphs:
IQA World Cup VII: The IQA World Cup VII was the 2014 edition of the IQA World Cup (now the US Quidditch Cup), a quidditch club tournament then organized by the International Quidditch Association.  The tournament was held in North Myrtle Beach, South Carolina from April 5–6, 2014.

2017 Asian Quidditch Cup: The 2017 Asian Quidditch Cup is the second edition of the Asian Quidditch Cup (AQC).  It was held in Hanoi, Vietnam on 23 July 2017.  Five teams from Australia, Malaysia, South Korea and Vietnam competed in the tournament.

US Quidditch Cup 9: The US Quidditch Cup 9 was the 2016 edition of the US Quidditch Cup, a quidditch club tournament organized by US Quidditch.  The tournament was held in Columbia, South Carolina from April 16–17, 2016.

Spanish Quidditch Cup: The Spanish Quidditch Cup is the main championship of the Spanish quidditch.  It's an annual event, celebrated for the first time in 2016.  The 2016 Spanish Quidditch Cup was the first edition of this tournament.  It was played on the February 6th and 7th, 2016 in Campo Grande football fields in Rivas-Vaciamadrid, Madrid.  8 teams from Andalusia, Basque Country, Galicia and Madrid joined for this event where the locals, Madrid Wolves, won the championship beating Bizkaia Boggarts in the final 140-70*.

European Games (quidditch): The IQA European Games (EG) are the biennial games for the sport of quidditch held in Europe where national governing bodies send national teams to compete.  The European Games were created in response to the IQA World Cup, the biennial tournament wherein nations from across the world compete in a similar style to the FIFA World Cup.  Both Games alternate years so in the off years regional tournaments such as the European Games or the Asian Quidditch Cup can occur.  These games are the highest level of championships in quidditch aside from Global Games.  The 2015 champions were Team France, narrowly beating Team UK.

South Korea: South Korea, officially the Republic of Korea (abbreviated ROK), is a sovereign state in East Asia, constituting the southern part of the Korean Peninsula.  Officially, its territory consists of the whole Korean Peninsula and its adjacent islands, which are largely mountainous.  South Koreans lead a distinctive urban lifestyle, as half of them live in high-rises concentrated in the Seoul Capital Area with 25 million residents.  The capital Seoul is the world's sixth leading global city with the fifth largest economy and is the seventh most sustainable city in the world.

European Quidditch Cup: The European Quidditch Cup, also known as EQC and formerly as the European Quidditch Championship, is the culminating championship tournament for the sport of quidditch in Europe.  It began to be legitimised in 2014 when the International Quidditch Association became an international federation for quidditch.  The first tournament took place in 2012 in France as quidditch began to develop across Europe.  Today, the tournament is the highest level of championship in Europe besides the European Games with league-level tournaments being the qualifying competitions.  EQC 2015 was held on 18–19 April 2015 in Oxford, UK.

US Quidditch Cup: The US Quidditch Cup is the United States championship of quidditch.  Held yearly in the US since 2007, it was formerly organized by the International Quidditch Association and known as the Quidditch World Cup.  Although maintained by the IQA, it was almost a purely US-based tournament, seeing little turnout from teams outside of the country.  This tournament's organizing body was changed to US Quidditch when the IQA took on its new role as international sports federation, choosing instead to host Global Games as a world championship with individual teams relying on their national governing body for a culminating tournament.

Northern and Southern Cups: The Northern and Southern Cups are the two major regional quidditch tournaments of the United Kingdom.  Organised by QuidditchUK, the tournaments serve both as qualification prerequisites for other tournaments, such as the European Quidditch Cup and the British Quidditch cup alongside being there own stand alone tournaments.  regionals are often considered the most important tournaments of the year, after the British Quidditch Cup.

US Quidditch Cup 10: The US Quidditch Cup 10 will be the 2017 edition of the US Quidditch Cup, a quidditch club tournament organized by US Quidditch.  The tournament will for the second time take place in Kissimmee, Florida from April 8–9, 2017.

Supporting paragraphs: 2017 Asian Quidditch Cup South Korea
Answer: South Korea