Question: How many regions does the institution that authorized giving troops the ability to follow the North Korean forces north recognize in the continent where Chelyabinsk is located?

full_context: Document 1: Chelyabinsk: Chelyabinsk () is a city and the administrative center of Chelyabinsk Oblast, Russia, located in the northeast of the oblast, south of Yekaterinburg, just to the east of the Ural Mountains, on the Miass River, on the border of Europe and Asia. Population:
Document 2: Korean War: In the resulting Battle of Pusan Perimeter (August–September 1950), the U.S. Army withstood KPA attacks meant to capture the city at the Naktong Bulge, P'ohang-dong, and Taegu. The United States Air Force (USAF) interrupted KPA logistics with 40 daily ground support sorties that destroyed 32 bridges, halting most daytime road and rail traffic. KPA forces were forced to hide in tunnels by day and move only at night. To deny matériel to the KPA, the USAF destroyed logistics depots, petroleum refineries, and harbors, while the U.S. Navy air forces attacked transport hubs. Consequently, the over-extended KPA could not be supplied throughout the south. On 27 August, 67th Fighter Squadron aircraft mistakenly attacked facilities in Chinese territory and the Soviet Union called the UN Security Council's attention to China's complaint about the incident. The US proposed that a commission of India and Sweden determine what the US should pay in compensation but the Soviets vetoed the US proposal.
Document 3: Korean War: Meanwhile, on 10 October 1950, the 89th Tank Battalion was attached to the 1st Cavalry Division, increasing the armor available for the Northern Offensive. On 15 October, after moderate KPA resistance, the 7th Cavalry Regiment and Charlie Company, 70th Tank Battalion captured Namchonjam city. On 17 October, they flanked rightwards, away from the principal road (to Pyongyang), to capture Hwangju. Two days later, the 1st Cavalry Division captured Pyongyang, the North's capital city, on 19 October 1950. Kim Il Sung and his government temporarily moved its capital to Sinuiju – although as UNC forces approached, the government again moved – this time to Kanggye.
Document 4: Military history of the United States: The war started badly for the US and UN. North Korean forces struck massively in the summer of 1950 and nearly drove the outnumbered US and ROK defenders into the sea. However the United Nations intervened, naming Douglas MacArthur commander of its forces, and UN-US-ROK forces held a perimeter around Pusan, gaining time for reinforcement. MacArthur, in a bold but risky move, ordered an amphibious invasion well behind the front lines at Inchon, cutting off and routing the North Koreans and quickly crossing the 38th Parallel into North Korea. As UN forces continued to advance toward the Yalu River on the border with Communist China, the Chinese crossed the Yalu River in October and launched a series of surprise attacks that sent the UN forces reeling back across the 38th Parallel. Truman originally wanted a Rollback strategy to unify Korea; after the Chinese successes he settled for a Containment policy to split the country. MacArthur argued for rollback but was fired by President Harry Truman after disputes over the conduct of the war. Peace negotiations dragged on for two years until President Dwight D. Eisenhower threatened China with nuclear weapons; an armistice was quickly reached with the two Koreas remaining divided at the 38th parallel. North and South Korea are still today in a state of war, having never signed a peace treaty, and American forces remain stationed in South Korea as part of American foreign policy.
Document 5: United Nations Population Fund: The UNFPA supports programs in more than 150 countries, territories and areas spread across four geographic regions: Arab States and Europe, Asia and the Pacific, Latin America and the Caribbean, and sub-Saharan Africa. Around three quarters of the staff work in the field. It is a member of the United Nations Development Group and part of its Executive Committee.
Document 6: Korean War: By August, the KPA had pushed back the ROK Army and the Eighth United States Army to the vicinity of Pusan in southeast Korea. In their southward advance, the KPA purged the Republic of Korea's intelligentsia by killing civil servants and intellectuals. On 20 August, General MacArthur warned North Korean leader Kim Il-sung that he was responsible for the KPA's atrocities. By September, the UN Command controlled the Pusan perimeter, enclosing about 10% of Korea, in a line partially defined by the Nakdong River.
Document 7: Post-Soviet states: The 15 post-Soviet states are typically divided into the following five groupings. Each of these regions has its own common set of traits, owing not only to geographic and cultural factors but also to that region's history in relation to Russia. In addition, there are a number of de facto independent, but internationally unrecognized states (see the section Separatist conflicts below).
Document 8: United Nations Regional Groups: the African Group, with 54 member states the Asia - Pacific Group, with 53 member states the Eastern European Group, with 23 member states the Latin American and Caribbean Group (GRULAC), with 33 member states the Western European and Others Group (WEOG), with 28 member states, plus 1 member state (the United States) as an observer state.
Document 9: Russia: Russia (/ ˈrʌʃə / (listen); Russian: Росси́я, tr. Rossiya; IPA: (rɐˈsjijə)), also officially known as the Russian Federation (Russian: Российская Федерация, tr. Rossiyskaya Federatsiya; IPA: (rɐˈsijskəjə fjɪdjɪˈratsɨjə)), is a country in Eurasia. At 17,125,200 square kilometres (6,612,100 sq mi), Russia is the largest country in the world by surface area, covering more than one - eighth of the Earth's inhabited land area, and the ninth most populous, with over 144 million people at the end of March 2016. The European western part of the country is much more populated and urbanised than the eastern; about 77% of the population live in European Russia. Russia's capital Moscow is one of the largest cities in the world; other major urban centers include Saint Petersburg, Novosibirsk, Yekaterinburg, Chelyabinsk, Nizhny Novgorod, Ufa, and Kazan.
Document 10: Korean War: By 1 October 1950, the UN Command repelled the KPA northwards past the 38th parallel; the ROK Army crossed after them, into North Korea. MacArthur made a statement demanding the KPA's unconditional surrender. Six days later, on 7 October, with UN authorization, the UN Command forces followed the ROK forces northwards. The X Corps landed at Wonsan (in southeastern North Korea) and Riwon (in northeastern North Korea), already captured by ROK forces. The Eighth U.S. Army and the ROK Army drove up western Korea and captured Pyongyang city, the North Korean capital, on 19 October 1950. The 187th Airborne Regimental Combat Team ("Rakkasans") made their first of two combat jumps during the Korean War on 20 October 1950 at Sunchon and Sukchon. The missions of the 187th were to cut the road north going to China, preventing North Korean leaders from escaping from Pyongyang; and to rescue American prisoners of war. At month's end, UN forces held 135,000 KPA prisoners of war. As they neared the Sino-Korean border, the UN forces in the west were divided from those in the east by 50–100 miles of mountainous terrain.
Document 11: Near East: The United Nations formulates multiple regional divisions as is convenient for its various operations. But few of them include a Near East, and that poorly defined. UNICEF recognizes the "Middle East and North Africa" region, where the Middle East is bounded by the Red Sea on the west and includes Iran on the east. UNESCO recognizes neither a Near East nor a Middle East, dividing the countries instead among three regions: Arab States, Asia and the Pacific, and Africa. Its division "does not forcibly reflect geography" but "refers to the execution of regional activities." The United Nations Statistics Division defines Western Asia to contain the countries included elsewhere in the Middle East. The Food and Agriculture Organization (FAO) describes its entire theatre of operations as the Near East, but then assigns many of its members to other regions as well; for example, Cyprus, Malta and Turkey are in both the European and the Near Eastern regions. Its total area extends further into Central Asia than that of most agencies.
Document 12: World Health Organization: As of 2016, the WHO has 194 member states: all of them Member States of the United Nations except for the Cook Islands and Niue. (A state becomes a full member of WHO by ratifying the treaty known as the Constitution of the World Health Organization.) As of 2013, it also had two associate members, Puerto Rico and Tokelau. Several other countries have been granted observer status. Palestine is an observer as a ``national liberation movement ''recognized by the League of Arab States under United Nations Resolution 3118. The Holy See also attends as an observer, as does the Order of Malta. In 2010, Taiwan was invited under the name of`` Chinese Taipei''.
Document 13: Ay River: Ay River (, ) is a river in Bashkortostan and Chelyabinsk Oblast in Russia, a left tributary of the Ufa River. The river is long, and its drainage basin covers . The Ay freezes up in late October or early November and remains icebound until mid-April. The cities of Zlatoust and Kusa are along the Ay River. Along the banks of the river, there are many steep cliff sides and caves. The current of the river has been used for hydroelectric power. It is also possible to fish for pike, bleak, and carp, to name a few species.
Document 14: Ulyanovsk Oblast: Ulyanovsk Oblast (Russian: Улья́новская о́бласть, Ulyanovskaya oblast) is a federal subject of Russia (an oblast). It is located in the Volga Federal District. Its administrative center is the city of Ulyanovsk. Population: 1,292,799 (2010 Census).
Document 15: Kazakhstan: It shares borders of 6,846 kilometres (4,254 mi) with Russia, 2,203 kilometres (1,369 mi) with Uzbekistan, 1,533 kilometres (953 mi) with China, 1,051 kilometres (653 mi) with Kyrgyzstan, and 379 kilometres (235 mi) with Turkmenistan. Major cities include Nur-Sultan, Almaty, Karagandy, Shymkent, Atyrau, and Oskemen. It lies between latitudes 40° and 56° N, and longitudes 46° and 88° E. While located primarily in Asia, a small portion of Kazakhstan is also located west of the Urals in Eastern Europe.Kazakhstan's terrain extends west to east from the Caspian Sea to the Altay Mountains and north to south from the plains of Western Siberia to the oases and deserts of Central Asia. The Kazakh Steppe (plain), with an area of around 804,500 square kilometres (310,600 sq mi), occupies one-third of the country and is the world's largest dry steppe region. The steppe is characterised by large areas of grasslands and sandy regions. Major seas, lakes and rivers include the Aral Sea, Lake Balkhash and Lake Zaysan, the Charyn River and gorge and the Ili, Irtysh, Ishim, Ural and Syr Darya rivers.
ground_truth: 53 member states
sub_queries: What is the continent of Chelyabinsk? Answer: Asia
Who authorized giving troops the ability to follow the North Korean forces north? Answer: the UN
the the UN recognises how many regions in #1 Answer: 53 member states